Created Playlist

migrations/2024-04-13-024749_create_playlists_table/down.sql

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+-- This file should undo anything in `up.sql`
+DROP TABLE playlists;

migrations/2024-04-13-024749_create_playlists_table/up.sql

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+-- Your SQL goes here
+CREATE TABLE playlists (
+    id SERIAL PRIMARY KEY UNIQUE NOT NULL,
+    name VARCHAR NOT NULL,
+    user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL
+);
+
+CREATE TABLE playlist_songs (
+    playlist_id INTEGER REFERENCES playlists(id) ON DELETE CASCADE NOT NULL,
+    song_id INTEGER REFERENCES songs(id) ON DELETE CASCADE NOT NULL,
+    PRIMARY KEY (playlist_id, song_id)
+);