diff --git a/App/.idea/workspace.xml b/App/.idea/workspace.xml
index 969f846..ffd5232 100644
--- a/App/.idea/workspace.xml
+++ b/App/.idea/workspace.xml
@@ -2,7 +2,30 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="ecb85847-acff-4336-b3d7-4f5563aac01d" name="Default" comment="Created class for database managing - files for database creation adapted to Cassandra model">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/database/__init__.py" beforeDir="false" afterPath="$PROJECT_DIR$/database/__init__.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/db_script_pycharm.ddl" beforeDir="false" afterPath="$PROJECT_DIR$/db_script_pycharm.ddl" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/Logical.svg" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/Logical.svg" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/Relational.svg" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/Relational.svg" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/ChangeRequests.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/ChangeRequests.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/businessinfo/Objects.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/businessinfo/Objects.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/DDLSelection.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/DDLSelection.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/Objects.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/datatypes/Objects.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/dl_settings.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/dl_settings.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/Diagrams.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/Diagrams.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/Objects.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/Objects.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/subviews/2C149101-C988-9E4D-2C9E-2746FB965570.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/logical/subviews/2C149101-C988-9E4D-2C9E-2746FB965570.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/pm/Objects.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/pm/Objects.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rdbms/database_design_RDBMSSites.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rdbms/database_design_RDBMSSites.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/DDLSelection.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/DDLSelection.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Diagrams.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Diagrams.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Design/DB_STRUCTURE/db_script.cql" beforeDir="false" afterPath="$PROJECT_DIR$/../Design/DB_STRUCTURE/db_script.cql" afterDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="TRACKING_ENABLED" value="true" />
@@ -86,7 +109,7 @@
         <entry file="file://$PROJECT_DIR$/application.py">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="102">
-              <caret line="7" lean-forward="true" selection-start-line="7" selection-end-line="7" />
+              <caret line="7" selection-start-line="7" selection-end-line="7" />
             </state>
           </provider>
         </entry>
@@ -94,8 +117,8 @@
       <file leaf-file-name="__init__.py" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/database/__init__.py">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="544">
-              <caret line="32" column="8" lean-forward="true" selection-start-line="32" selection-start-column="8" selection-end-line="32" selection-end-column="8" />
+            <state relative-caret-position="554">
+              <caret line="84" column="4" lean-forward="true" selection-start-line="84" selection-start-column="4" selection-end-line="84" selection-end-column="4" />
               <folding>
                 <element signature="e#0#37#0" expanded="true" />
               </folding>
@@ -137,11 +160,10 @@
   <component name="NodePackageJsonFileManager">
     <packageJsonPaths />
   </component>
-  <component name="ProjectFrameBounds" extendedState="6">
-    <option name="x" value="-9" />
-    <option name="y" value="-9" />
-    <option name="width" value="977" />
-    <option name="height" value="1038" />
+  <component name="ProjectFrameBounds">
+    <option name="x" value="951" />
+    <option name="width" value="978" />
+    <option name="height" value="1039" />
   </component>
   <component name="ProjectLevelVcsManager" settingsEditedManually="true">
     <ConfirmationsSetting value="2" id="Add" />
@@ -151,6 +173,7 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="Scope" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
@@ -167,7 +190,6 @@
           <select />
         </subPane>
       </pane>
-      <pane id="Scope" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -252,48 +274,56 @@
     <servers />
   </component>
   <component name="ToolWindowManager">
-    <frame x="-7" y="-7" width="1550" height="838" extended-state="6" />
+    <frame x="761" y="0" width="782" height="831" extended-state="0" />
     <editor active="true" />
     <layout>
       <window_info anchor="bottom" id="TODO" order="12" />
-      <window_info anchor="bottom" id="Event Log" order="3" side_tool="true" weight="0.32965517" />
+      <window_info anchor="bottom" id="Event Log" order="3" side_tool="true" />
       <window_info anchor="bottom" id="Database Changes" order="2" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" order="1" />
-      <window_info anchor="bottom" id="Python Console" order="5" weight="0.32965517" />
+      <window_info anchor="bottom" id="Python Console" order="5" />
       <window_info anchor="bottom" id="Run" order="8" weight="0.32965517" />
       <window_info anchor="bottom" id="Terminal" order="4" />
       <window_info anchor="right" id="Remote Host" order="2" />
-      <window_info content_ui="combo" id="Project" order="1" visible="true" weight="0.18945312" />
+      <window_info content_ui="combo" id="Project" order="1" weight="0.26302084" />
       <window_info anchor="bottom" id="Docker" order="0" show_stripe_button="false" />
-      <window_info anchor="right" id="Database" order="0" weight="0.3294271" />
-      <window_info anchor="bottom" id="Find" order="7" weight="0.32965517" />
+      <window_info anchor="right" id="Database" order="0" />
       <window_info anchor="right" id="SciView" order="1" />
       <window_info id="Structure" order="2" side_tool="true" weight="0.25" />
       <window_info id="Favorites" order="0" side_tool="true" />
       <window_info anchor="bottom" id="Debug" order="9" weight="0.4" />
-      <window_info anchor="bottom" id="Debug" order="9" weight="0.4" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="5" weight="0.25" />
-      <window_info anchor="bottom" id="Docker" order="0" show_stripe_button="false" />
       <window_info anchor="bottom" id="Inspection" order="11" weight="0.4" />
-      <window_info anchor="right" id="Remote Host" order="2" />
-      <window_info active="true" content_ui="combo" id="Project" order="1" visible="true" weight="0.26367188" />
-      <window_info anchor="right" id="SciView" order="1" />
       <window_info anchor="right" id="Commander" order="3" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="4" weight="0.25" />
-      <window_info anchor="bottom" id="TODO" order="12" />
+      <window_info anchor="bottom" id="Message" order="6" />
+      <window_info anchor="bottom" id="Cvs" order="10" weight="0.25" />
+      <window_info anchor="bottom" id="Find" order="7" weight="0.32965517" />
+    </layout>
+    <layout-to-restore>
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="5" weight="0.25" />
+      <window_info anchor="bottom" id="Docker" order="0" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" order="1" />
-      <window_info anchor="bottom" id="Run" order="8" weight="0.32965517" />
-      <window_info anchor="bottom" id="Database Changes" order="2" show_stripe_button="false" />
+      <window_info anchor="right" id="Ant Build" order="4" weight="0.25" />
+      <window_info anchor="right" id="Remote Host" order="2" />
+      <window_info active="true" content_ui="combo" id="Project" order="1" visible="true" weight="0.26302084" />
       <window_info id="Structure" order="2" side_tool="true" weight="0.25" />
+      <window_info anchor="right" id="Commander" order="3" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="12" />
+      <window_info anchor="bottom" id="Database Changes" order="2" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Run" order="8" weight="0.32965517" />
+      <window_info anchor="bottom" id="Find" order="7" weight="0.32965517" />
+      <window_info anchor="bottom" id="Python Console" order="5" />
+      <window_info anchor="bottom" id="Debug" order="9" weight="0.4" />
       <window_info anchor="right" id="Database" order="0" />
-      <window_info anchor="bottom" id="Message" order="6" />
+      <window_info anchor="bottom" id="Terminal" order="4" />
       <window_info anchor="bottom" id="Event Log" order="3" side_tool="true" />
+      <window_info anchor="bottom" id="Inspection" order="11" weight="0.4" />
+      <window_info anchor="right" id="SciView" order="1" />
       <window_info anchor="bottom" id="Cvs" order="10" weight="0.25" />
+      <window_info anchor="bottom" id="Message" order="6" />
       <window_info id="Favorites" order="0" side_tool="true" />
-      <window_info anchor="bottom" id="Find" order="7" weight="0.32965517" />
-      <window_info anchor="bottom" id="Terminal" order="4" />
-      <window_info anchor="bottom" id="Python Console" order="5" />
-    </layout>
+    </layout-to-restore>
   </component>
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="1" />
@@ -315,14 +345,28 @@
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/application.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="306">
-          <caret line="18" column="9" selection-start-line="18" selection-start-column="9" selection-end-line="18" selection-end-column="9" />
+        <state relative-caret-position="119">
+          <caret line="7" lean-forward="true" selection-start-line="7" selection-end-line="7" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/database/__init__.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="1054">
+          <caret line="62" column="41" selection-start-line="62" selection-start-column="41" selection-end-line="62" selection-end-column="41" />
           <folding>
-            <element signature="e#154#185#0" expanded="true" />
+            <element signature="e#0#37#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/application.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="306">
+          <caret line="18" column="9" selection-start-line="18" selection-start-column="9" selection-end-line="18" selection-end-column="9" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/upgrader/__init__.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="170">
@@ -363,19 +407,14 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="425">
           <caret line="25" column="61" lean-forward="true" selection-start-line="25" selection-start-column="61" selection-end-line="25" selection-end-column="61" />
-          <folding>
-            <element signature="e#0#32#0" expanded="true" />
-          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app_data.dict">
-      <provider selected="true" editor-type-id="text-editor" />
-    </entry>
+    <entry file="file://$PROJECT_DIR$/app_data.dict" />
     <entry file="file://$PROJECT_DIR$/application.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="102">
-          <caret line="7" lean-forward="true" selection-start-line="7" selection-end-line="7" />
+          <caret line="7" selection-start-line="7" selection-end-line="7" />
         </state>
       </provider>
     </entry>
@@ -388,8 +427,8 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/database/__init__.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="544">
-          <caret line="32" column="8" lean-forward="true" selection-start-line="32" selection-start-column="8" selection-end-line="32" selection-end-column="8" />
+        <state relative-caret-position="554">
+          <caret line="84" column="4" lean-forward="true" selection-start-line="84" selection-start-column="4" selection-end-line="84" selection-end-column="4" />
           <folding>
             <element signature="e#0#37#0" expanded="true" />
           </folding>
diff --git a/App/database/__init__.py b/App/database/__init__.py
index d07d5c3..3310299 100644
--- a/App/database/__init__.py
+++ b/App/database/__init__.py
@@ -56,4 +56,29 @@ def registerNewSong(self, file_id: str, video_id: str, audio_quality: int, audio
         is_metadata_by_user) VALUES (%s, %s, %s, %s, %s, %s)
         """
         self.__session.execute(query, (file_id, video_id, audio_quality, audio_format, times_requested,
-                                       is_metadata_by_user))
\ No newline at end of file
+                                       is_metadata_by_user))
+
+    def registerNewPlaylist(self, playlist_id: str, number_elements: int, times_requested: int):
+        query = """
+        INSERT INTO YouTubeMDApp.playlist(playlist_id, number_elements, times_requested) VALUES (%s, %s, %s)
+        """
+        self.__session.execute(query, (playlist_id, number_elements, times_requested))
+
+    def registerNewSongForPlaylist(self, playlist_id: str, file_id: str, playlist_quality: str, playlist_format: str):
+        query = """
+        INSERT INTO YouTubeMDApp.playlist_has_music 
+        (playlist_playlist_id, music_file_id, playlist_quality, playlist_format) VALUES (%s, %s, %s, %s)
+        """
+        self.__session.execute(query, (playlist_id, file_id, playlist_quality, playlist_format))
+
+    def registerNewSongMetadata(self, title: str, artist: str, cover: str, duration: str, file_id: str):
+        query = """
+        INSERT INTO YouTubeMDApp.metadata(title, artist, cover, duration, music_file_id) VALUES (%s, %s, %s, %s, %s)
+        """
+        self.__session.execute(query, (title, artist, cover, duration, file_id))
+
+    def registerNewSongInHistory(self, user_id: int, file_id: str):
+        query = """
+        INSERT INTO YouTubeMDApp.history(user_id, file_id) VALUES (%s, %s)
+        """
+        self.__session.execute(query, (user_id, file_id))
diff --git a/App/db_script_pycharm.ddl b/App/db_script_pycharm.ddl
index 3c24d37..ae468fb 100644
--- a/App/db_script_pycharm.ddl
+++ b/App/db_script_pycharm.ddl
@@ -4,7 +4,7 @@ CREATE TABLE IF NOT EXISTS history (user_id int NOT NULL, file_id varchar NOT NU
 CREATE TABLE IF NOT EXISTS metadata (title varchar, artist varchar, cover text, duration varchar, music_file_id varchar NOT NULL, PRIMARY KEY (music_file_id));
 CREATE TABLE IF NOT EXISTS music (file_id varchar NOT NULL,video_id varchar, audio_quality int, audio_format int, times_requested int, is_metadata_by_user boolean, PRIMARY KEY (file_id));
 CREATE TABLE IF NOT EXISTS playlist (playlist_id varchar NOT NULL, number_elements int, times_requested int, PRIMARY KEY (playlist_id));
-CREATE TABLE IF NOT EXISTS playlist_has_music (playlist_playlist_id varchar NOT NULL, music_file_id varchar NOT NULL);
+CREATE TABLE IF NOT EXISTS playlist_has_music (playlist_playlist_id varchar NOT NULL, music_file_id varchar NOT NULL, playlist_quality int, playlist_format int);
 CREATE TABLE IF NOT EXISTS preferences (audio_quality varchar, audio_format varchar, os varchar, should_ask_metadata boolean, user_id int NOT NULL, PRIMARY KEY (user_id));
 CREATE TABLE IF NOT EXISTS "User" (user_id int NOT NULL, username varchar, name text, PRIMARY KEY (user_id));
 CREATE TABLE IF NOT EXISTS Statistics (lang varchar, downloads int, last_time_active datetime, user_id int NOT NULL, PRIMARY KEY(user_id));
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/Logical.svg b/Design/DB_STRUCTURE/Logical.svg
index 5457059..e281edf 100644
--- a/Design/DB_STRUCTURE/Logical.svg
+++ b/Design/DB_STRUCTURE/Logical.svg
@@ -151,6 +151,18 @@ o
 <text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
 times_requested
 </text>
+<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+o
+</text>
+<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+playlist_quality
+</text>
+<text x="16" y="88" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+o
+</text>
+<text x="26" y="88" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+playlist_format
+</text>
 </g>
 <g  fill="rgb(164,225,255)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath6_0_)" transform="translate(302,31)" >
 <rect x="0" y="0" width="169" height="109" rx="20" ry="20" />
@@ -179,6 +191,30 @@ o
 name
 </text>
 </g>
+<g  fill="rgb(164,225,255)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath5_0_)" transform="translate(39,29)" >
+<rect x="0" y="0" width="169" height="109" rx="20" ry="20" />
+<text id="Statistics" x="62" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Statistics
+</text>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+o
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+lang
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+o
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+downloads
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+o
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+last_time_active
+</text>
+</g>
 <g  fill="rgb(164,225,255)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath2_0_)" transform="translate(305,287)" >
 <rect x="0" y="0" width="169" height="109" rx="20" ry="20" />
 <text id="Music" x="70" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
@@ -224,29 +260,5 @@ o
 is_metadata_by_user
 </text>
 </g>
-<g  fill="rgb(164,225,255)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath5_0_)" transform="translate(39,29)" >
-<rect x="0" y="0" width="169" height="109" rx="20" ry="20" />
-<text id="Statistics" x="62" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
-Statistics
-</text>
-<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-o
-</text>
-<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-lang
-</text>
-<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-o
-</text>
-<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-downloads
-</text>
-<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-o
-</text>
-<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-last_time_active
-</text>
-</g>
 
 </svg>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/Relational.svg b/Design/DB_STRUCTURE/Relational.svg
index 38d8ff8..b7631e2 100644
--- a/Design/DB_STRUCTURE/Relational.svg
+++ b/Design/DB_STRUCTURE/Relational.svg
@@ -35,7 +35,7 @@
 <rect x="0" y="0" width="266" height="127" />
 </clipPath>
 <clipPath clipPathUnits="userSpaceOnUse" id="clipPath5_0_">
-<rect x="0" y="0" width="306" height="112" />
+<rect x="0" y="0" width="306" height="142" />
 </clipPath>
 <clipPath clipPathUnits="userSpaceOnUse" id="clipPath6_0_">
 <rect x="0" y="0" width="263" height="139" />
@@ -53,9 +53,9 @@
 <path stroke-dasharray="none" d=" M578.0 313.0 L566.0 307.0 L578.0 301.0 M563.0 311.0 L557.0 303.0 M557.0 311.0 L563.0 303.0" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
 </g>
 <g stroke-linecap="butt" >
-<path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M130 390 L130 142" />
+<path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M130 390 L130 172" />
 <polygon stroke="rgb(0,0,0)" stroke-dasharray="none" points="130 390 127 384 133 384" fill="rgb(0,0,0)" stroke-width="1" stroke-opacity="1.0"  />
-<path stroke-dasharray="none" d="M136.0 142.0 L130.0 154.0 L124.0 142.0 M136.0 154.5999994277954 L124.0 154.5999994277954" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
+<path stroke-dasharray="none" d="M136.0 172.0 L130.0 184.0 L124.0 172.0 M136.0 184.5999994277954 L124.0 184.5999994277954" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
 </g>
 <g stroke-linecap="butt" >
 <path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M590 467 L519 467" />
@@ -71,9 +71,9 @@
 <path stroke-dasharray="none" d=" M698.0 345.0 L692.0 357.0 L686.0 345.0 M696.0 360.0 L688.0 366.0 M696.0 366.0 L688.0 360.0" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
 </g>
 <g stroke-linecap="butt" >
-<path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M262 240 L262 142" />
+<path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M262 240 L262 172" />
 <polygon stroke="rgb(0,0,0)" stroke-dasharray="none" points="262 240 259 234 265 234" fill="rgb(0,0,0)" stroke-width="1" stroke-opacity="1.0"  />
-<path stroke-dasharray="none" d="M268.0 142.0 L262.0 154.0 L256.0 142.0 M268.0 154.5999994277954 L256.0 154.5999994277954" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
+<path stroke-dasharray="none" d="M268.0 172.0 L262.0 184.0 L256.0 172.0 M268.0 184.5999994277954 L256.0 184.5999994277954" fill="none" stroke-width="1" stroke-opacity="1.0" stroke="rgb(0,0,0)" />
 </g>
 <g stroke-linecap="butt" >
 <path stroke="rgb(0,0,0)" fill="none" stroke-opacity="1.0"  stroke-width="1" d="M794 467 L845 467" />
@@ -121,6 +121,64 @@ INTEGER
 Playlist_PK (playlist_id)
 </text>
 </g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath7_0_)" transform="translate(284,402)" >
+<rect x="0" y="0" width="234" height="126" />
+<text id="Statistics" x="94" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Statistics
+</text>
+<line x1="0" y1="18" x2="233" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+lang
+</text>
+<text x="124" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (5 CHAR)
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+downloads
+</text>
+<text x="124" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+last_time_active
+</text>
+<text x="124" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+DATE
+</text>
+<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+F
+</text>
+<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+User_user_id
+</text>
+<text x="124" y="74" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<line x1="0" y1="80" x2="233" y2="80" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#fk_sym" x="4" y="87" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#User" >
+<text x="16" y="94" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Statistics_User_FK (User_user_id)
+</text></a>
+<line x1="0" y1="100" x2="233" y2="100" fill="none" stroke="rgb(0,0,255)"/>
+<text x="2" y="114" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+U
+</text>
+<text x="16" y="114" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Statistics__IDX (User_user_id)
+</text>
+</g>
 <g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath8_0_)" transform="translate(590,412)" >
 <rect x="0" y="0" width="203" height="109" />
 <text id="User" x="90" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
@@ -233,7 +291,7 @@ Music_PK (file_id)
 </text>
 </g>
 <g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath5_0_)" transform="translate(2,30)" >
-<rect x="0" y="0" width="305" height="111" />
+<rect x="0" y="0" width="305" height="141" />
 <text id="Playlist_has_Music" x="105" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
 Playlist_has_Music
 </text>
@@ -262,18 +320,36 @@ Music_file_id
 <text x="134" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
 VARCHAR2 (256 CHAR)
 </text>
-<line x1="0" y1="52" x2="304" y2="52" fill="none" stroke="rgb(0,0,255)"/>
-<use xlink:href="#pk_sym" x="4" y="59" width="8" height="8" fill-opacity="1.0"/>
-<text x="16" y="66" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+playlist_quality
+</text>
+<text x="134" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+playlist_format
+</text>
+<text x="134" y="74" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<line x1="0" y1="80" x2="304" y2="80" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="87" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="94" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
 Playlist_has_Music_PK (Playlist_playlist_id, Music_file_id)
 </text>
-<line x1="0" y1="72" x2="304" y2="72" fill="none" stroke="rgb(0,0,255)"/>
-<use xlink:href="#fk_sym" x="4" y="79" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Playlist" >
-<text x="16" y="86" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+<line x1="0" y1="100" x2="304" y2="100" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#fk_sym" x="4" y="107" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Playlist" >
+<text x="16" y="114" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
 Playlist_has_Music_Playlist_FK (Playlist_playlist_id)
 </text></a>
-<use xlink:href="#fk_sym" x="4" y="93" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Music" >
-<text x="16" y="100" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+<use xlink:href="#fk_sym" x="4" y="121" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Music" >
+<text x="16" y="128" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
 Playlist_has_Music_Music_FK (Music_file_id)
 </text></a>
 </g>
@@ -456,63 +532,5 @@ History_User_FK (User_user_id)
 History_Music_FK (Music_file_id)
 </text></a>
 </g>
-<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath7_0_)" transform="translate(284,402)" >
-<rect x="0" y="0" width="234" height="126" />
-<text id="Statistics" x="94" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
-Statistics
-</text>
-<line x1="0" y1="18" x2="233" y2="18" fill="none" stroke="rgb(0,0,255)"/>
-<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-
-</text>
-<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-lang
-</text>
-<text x="124" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
-VARCHAR2 (5 CHAR)
-</text>
-<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-
-</text>
-<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-downloads
-</text>
-<text x="124" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
-INTEGER
-</text>
-<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-
-</text>
-<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-last_time_active
-</text>
-<text x="124" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
-DATE
-</text>
-<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-*
-</text>
-<text x="2" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-F
-</text>
-<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-User_user_id
-</text>
-<text x="124" y="74" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
-INTEGER
-</text>
-<line x1="0" y1="80" x2="233" y2="80" fill="none" stroke="rgb(0,0,255)"/>
-<use xlink:href="#fk_sym" x="4" y="87" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#User" >
-<text x="16" y="94" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-Statistics_User_FK (User_user_id)
-</text></a>
-<line x1="0" y1="100" x2="233" y2="100" fill="none" stroke="rgb(0,0,255)"/>
-<text x="2" y="114" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-U
-</text>
-<text x="16" y="114" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
-Statistics__IDX (User_user_id)
-</text>
-</g>
 
 </svg>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local b/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local
index c1f552c..40ff85f 100644
--- a/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local
+++ b/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local
@@ -1,4 +1,4 @@
 <?xml version = '1.0' encoding = 'UTF-8'?>
 <oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
-   <object objectType="main_view" objectID="CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA" name="DataTypes" visible="false"/>
+   <object objectType="main_view" objectID="CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA" name="" visible="false"/>
 </oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
diff --git a/Design/DB_STRUCTURE/database_design/logical/Objects.local b/Design/DB_STRUCTURE/database_design/logical/Objects.local
index da73ab3..59937eb 100644
--- a/Design/DB_STRUCTURE/database_design/logical/Objects.local
+++ b/Design/DB_STRUCTURE/database_design/logical/Objects.local
@@ -1,14 +1,14 @@
 <?xml version = '1.0' encoding = 'UTF-8'?>
 <oracle.dbtools.crest.model.design.logical.LogicalDesign>
    <object objectType="Entity" objectID="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B" name="Metadata" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Entity" objectID="FB782D70-50E0-0A98-4654-5E94050F8458" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Entity" objectID="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" name="Playlist" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
    <object objectType="Entity" objectID="312E0255-FAA7-1630-54E5-A4FCB50F6276" name="Preferences" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Entity" objectID="B1A287E6-50CA-DB8B-0AAD-60C303A2A402" name="Statistics" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" name="Playlist" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
    <object objectType="Entity" objectID="96125017-F1D2-153D-CBAC-D12E0939CF4E" name="User" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Relation" objectID="B934A368-41CA-2247-7505-4DDD707ADAB7" name="creates" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="B1A287E6-50CA-DB8B-0AAD-60C303A2A402"/>
-   <object objectType="Relation" objectID="46906DFA-66DD-2DD5-790C-7A87FFE7755C" name="has" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="FB782D70-50E0-0A98-4654-5E94050F8458" propertyTargetId="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B"/>
-   <object objectType="Relation" objectID="DDBAFE8B-B820-1773-EE96-8B363262CAA9" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="FB782D70-50E0-0A98-4654-5E94050F8458"/>
+   <object objectType="Entity" objectID="B1A287E6-50CA-DB8B-0AAD-60C303A2A402" name="Statistics" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="FB782D70-50E0-0A98-4654-5E94050F8458" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
    <object objectType="Relation" objectID="1D1B52B1-8974-5046-5AB7-7AB4BF89C08A" name="Playlist_has_Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" propertyTargetId="FB782D70-50E0-0A98-4654-5E94050F8458"/>
+   <object objectType="Relation" objectID="46906DFA-66DD-2DD5-790C-7A87FFE7755C" name="has" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="FB782D70-50E0-0A98-4654-5E94050F8458" propertyTargetId="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B"/>
+   <object objectType="Relation" objectID="B934A368-41CA-2247-7505-4DDD707ADAB7" name="creates" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="B1A287E6-50CA-DB8B-0AAD-60C303A2A402"/>
    <object objectType="Relation" objectID="C49FD692-24A0-3030-2280-A4D5B8CDFC01" name="sets" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="312E0255-FAA7-1630-54E5-A4FCB50F6276"/>
+   <object objectType="Relation" objectID="DDBAFE8B-B820-1773-EE96-8B363262CAA9" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="FB782D70-50E0-0A98-4654-5E94050F8458"/>
 </oracle.dbtools.crest.model.design.logical.LogicalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml
index 774e49d..34edc97 100644
--- a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml
@@ -54,6 +54,32 @@
 <logicalDatatype>LOGDT011</logicalDatatype>
 <ownDataTypeParameters>,,</ownDataTypeParameters>
 </Attribute>
+<Attribute name="playlist_quality" id="BCFF4641-2EDB-B760-2023-3BECCBA5CF60">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-20 19:10:08 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="playlist_format" id="80560FD1-D982-C45C-53EA-DC66BABB04CA">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-20 19:10:24 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
 </attributes>
 <identifiers itemClass="oracle.dbtools.crest.model.design.logical.CandidateKey">
 <identifier id="E3C428C4-0B62-6F66-F2BC-DB1AEE9F9400" name="Playlist PK">
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local
index afb34a8..1e510fa 100644
--- a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local
@@ -1,18 +1,18 @@
 <?xml version = '1.0' encoding = 'UTF-8'?>
 <oracle.dbtools.crest.model.design.relational.RelationalDesign>
-   <object objectType="Table" objectID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Table" objectID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" name="Metadata" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Table" objectID="25DE0936-5106-79A2-1678-9EAA1E0DA843" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
    <object objectType="Table" objectID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" name="Playlist" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Table" objectID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" name="Playlist_has_Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
-   <object objectType="Table" objectID="D088A558-CA22-9A96-F938-4F7712E4AEF1" name="Preferences" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
    <object objectType="Table" objectID="1243C675-86A2-977F-2EFA-8F6C72D2CB26" name="Statistics" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
    <object objectType="Table" objectID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" name="User" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
-   <object objectType="FKIndexAssociation" objectID="14761BF2-0284-F09E-1C36-5AD59C18B84E" name="History_Music_FK" seqName="seg_0" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
-   <object objectType="FKIndexAssociation" objectID="6AA622A5-D308-C63C-2AF6-730CF06EBF34" name="History_User_FK" seqName="seg_0" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
-   <object objectType="FKIndexAssociation" objectID="6A45C1C6-8C3B-317C-9221-BA841A05B730" name="Metadata_Music_FK" seqName="seg_0" containerID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB"/>
-   <object objectType="FKIndexAssociation" objectID="B59DC6EC-C75B-86D4-AFA3-705630B49873" name="Playlist_has_Music_Music_FK" seqName="seg_0" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
-   <object objectType="FKIndexAssociation" objectID="518E00B2-30C8-083A-0841-D61034BE188E" name="Playlist_has_Music_Playlist_FK" seqName="seg_0" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
-   <object objectType="FKIndexAssociation" objectID="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" name="Preferences_User_FK" seqName="seg_0" containerID="D088A558-CA22-9A96-F938-4F7712E4AEF1" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="D088A558-CA22-9A96-F938-4F7712E4AEF1"/>
-   <object objectType="FKIndexAssociation" objectID="51EE3780-3B5D-E1A1-65B0-7ED699DD5948" name="Statistics_User_FK" seqName="seg_0" containerID="1243C675-86A2-977F-2EFA-8F6C72D2CB26" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="1243C675-86A2-977F-2EFA-8F6C72D2CB26"/>
+   <object objectType="Table" objectID="25DE0936-5106-79A2-1678-9EAA1E0DA843" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" name="Playlist_has_Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="D088A558-CA22-9A96-F938-4F7712E4AEF1" name="Preferences" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" name="Metadata" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="FKIndexAssociation" objectID="14761BF2-0284-F09E-1C36-5AD59C18B84E" name="History_Music_FK" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
+   <object objectType="FKIndexAssociation" objectID="518E00B2-30C8-083A-0841-D61034BE188E" name="Playlist_has_Music_Playlist_FK" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
+   <object objectType="FKIndexAssociation" objectID="51EE3780-3B5D-E1A1-65B0-7ED699DD5948" name="Statistics_User_FK" containerID="1243C675-86A2-977F-2EFA-8F6C72D2CB26" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="1243C675-86A2-977F-2EFA-8F6C72D2CB26"/>
+   <object objectType="FKIndexAssociation" objectID="6A45C1C6-8C3B-317C-9221-BA841A05B730" name="Metadata_Music_FK" containerID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB"/>
+   <object objectType="FKIndexAssociation" objectID="6AA622A5-D308-C63C-2AF6-730CF06EBF34" name="History_User_FK" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
+   <object objectType="FKIndexAssociation" objectID="B59DC6EC-C75B-86D4-AFA3-705630B49873" name="Playlist_has_Music_Music_FK" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
+   <object objectType="FKIndexAssociation" objectID="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" name="Preferences_User_FK" containerID="D088A558-CA22-9A96-F938-4F7712E4AEF1" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="D088A558-CA22-9A96-F938-4F7712E4AEF1"/>
 </oracle.dbtools.crest.model.design.relational.RelationalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml
index c4652da..3523de1 100644
--- a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml
@@ -32,7 +32,7 @@
 </OView>
 <OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" otype="Table" vid="44FE6C73-9DC7-1AD1-9776-430C14CF03AD">
 <hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
-<bounds x="2" y="30" width="306" height="112"/>
+<bounds x="2" y="30" width="306" height="142"/>
 </OView>
 <OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="D088A558-CA22-9A96-F938-4F7712E4AEF1" otype="Table" vid="A05D5803-ED8E-B325-BEA5-C740A63CE2DF">
 <hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
@@ -63,7 +63,7 @@
 <lineWidth>1</lineWidth>
 <points>
 <point x="130" y="390"/>
-<point x="130" y="142"/>
+<point x="130" y="172"/>
 </points>
 </Connector>
 <Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="51EE3780-3B5D-E1A1-65B0-7ED699DD5948" otype="FKIndexAssociation" vid_source="D2EC0BC0-F700-1329-2716-2C21984B5622" vid_target="96F7DC31-5392-F6F5-90A9-53BD7AAFBAD7">
@@ -99,7 +99,7 @@
 <lineWidth>1</lineWidth>
 <points>
 <point x="262" y="240"/>
-<point x="262" y="142"/>
+<point x="262" y="172"/>
 </points>
 </Connector>
 <Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" otype="FKIndexAssociation" vid_source="D2EC0BC0-F700-1329-2716-2C21984B5622" vid_target="A05D5803-ED8E-B325-BEA5-C740A63CE2DF">
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml
index 7d6b4d0..3eb66f1 100644
--- a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml
@@ -37,6 +37,28 @@
 <colAssociation fkAssociation="B59DC6EC-C75B-86D4-AFA3-705630B49873" referredColumn="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB"/>
 </associations>
 </Column>
+<Column name="playlist_quality" id="37D138F2-15D2-216D-04B4-9E7D510E4AB4">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-20 19:09:34 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="playlist_format" id="8C829605-2812-5AB3-DA74-D18B5CDF8A18">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-20 19:09:45 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
 </columns>
 <indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
 <ind_PK_UK id="26077F0B-DF80-4C22-9679-E91111201BFD" name="Playlist_has_Music_PK">
diff --git a/Design/DB_STRUCTURE/db_script.cql b/Design/DB_STRUCTURE/db_script.cql
index 3c24d37..ae468fb 100644
--- a/Design/DB_STRUCTURE/db_script.cql
+++ b/Design/DB_STRUCTURE/db_script.cql
@@ -4,7 +4,7 @@ CREATE TABLE IF NOT EXISTS history (user_id int NOT NULL, file_id varchar NOT NU
 CREATE TABLE IF NOT EXISTS metadata (title varchar, artist varchar, cover text, duration varchar, music_file_id varchar NOT NULL, PRIMARY KEY (music_file_id));
 CREATE TABLE IF NOT EXISTS music (file_id varchar NOT NULL,video_id varchar, audio_quality int, audio_format int, times_requested int, is_metadata_by_user boolean, PRIMARY KEY (file_id));
 CREATE TABLE IF NOT EXISTS playlist (playlist_id varchar NOT NULL, number_elements int, times_requested int, PRIMARY KEY (playlist_id));
-CREATE TABLE IF NOT EXISTS playlist_has_music (playlist_playlist_id varchar NOT NULL, music_file_id varchar NOT NULL);
+CREATE TABLE IF NOT EXISTS playlist_has_music (playlist_playlist_id varchar NOT NULL, music_file_id varchar NOT NULL, playlist_quality int, playlist_format int);
 CREATE TABLE IF NOT EXISTS preferences (audio_quality varchar, audio_format varchar, os varchar, should_ask_metadata boolean, user_id int NOT NULL, PRIMARY KEY (user_id));
 CREATE TABLE IF NOT EXISTS "User" (user_id int NOT NULL, username varchar, name text, PRIMARY KEY (user_id));
 CREATE TABLE IF NOT EXISTS Statistics (lang varchar, downloads int, last_time_active datetime, user_id int NOT NULL, PRIMARY KEY(user_id));
\ No newline at end of file