CREATE TABLE song_likes (
	song_id INTEGER REFERENCES songs(id) ON DELETE CASCADE NOT NULL,
	user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
	PRIMARY KEY (song_id, user_id)
);

CREATE TABLE song_dislikes (
	song_id INTEGER REFERENCES songs(id) ON DELETE CASCADE NOT NULL,
	user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
	PRIMARY KEY (song_id, user_id)
);