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CREATE TABLE album (
title varchar(100) NOT NULL PRIMARY KEY
);
CREATE TABLE artist (
name varchar(25) NOT NULL PRIMARY KEY
);
CREATE TABLE album_artists (
album_title varchar(100) NOT NULL CONSTRAINT fk_album REFERENCES album(title) ON DELETE CASCADE,
artist_name varchar(25) NOT NULL CONSTRAINT fk_artist REFERENCES artist(name) ON DELETE CASCADE
);
CREATE TABLE track (
id INTEGER NOT NULL PRIMARY KEY,
song_name varchar(200) NOT NULL default '',
album_id varchar(100) NOT NULL CONSTRAINT fk_album_1 REFERENCES album(title) ON DELETE CASCADE
);
CREATE TABLE cover(
album varchar(200) NOT NULL CONSTRAINT fk_album_2 REFERENCES album(title) ON DELETE CASCADE,
content text
);
INSERT INTO album (title) VALUES ('Album 1');
INSERT INTO album (title) VALUES ('Album 2');
INSERT INTO cover(album,content) VALUES ('Album 1', 'lalala');
INSERT INTO cover(album,content) VALUES ('Album 2', 'conver content');
INSERT INTO artist (name) VALUES ('Dan');
INSERT INTO artist (name) VALUES ('Jenny');
INSERT INTO artist (name) VALUES ('Karl');
INSERT INTO artist (name) VALUES ('Tom');
INSERT INTO album_artists (album_title, artist_name) VALUES ('Album 1', 'Dan');
INSERT INTO album_artists (album_title, artist_name) VALUES ('Album 2', 'Dan');
INSERT INTO album_artists (album_title, artist_name) VALUES ('Album 1', 'Jenny');
INSERT INTO album_artists (album_title, artist_name) VALUES ('Album 2', 'Karl');
INSERT INTO album_artists (album_title, artist_name) VALUES ('Album 2', 'Tom');
INSERT INTO track (id, song_name, album_id) VALUES (1, 'Track 1', 'Album 1');
INSERT INTO track (id, song_name, album_id) VALUES (2, 'Song 2', 'Album 1');
INSERT INTO track (id, song_name, album_id) VALUES (3, 'Track A', 'Album 2');
INSERT INTO track (id, song_name, album_id) VALUES (4, 'Track B', 'Album 2');
INSERT INTO track (id, song_name, album_id) VALUES (5, 'Song 3', 'Album 1');
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