Sam Park

music.sql

@@ -0,0 +1,45 @@
+-- sqlite3 music.db
+
+CREATE TABLE track (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title VARCHAR(256) NOT NULL,
+    album_id INT REFERENCES album(id)
+);
+
+CREATE TABLE artist (
+    id INTEGER PRIMARY KEY AUTOINCREMENT, 
+    name VARCHAR(256) NOT NULL
+);
+
+CREATE TABLE album (
+    id INTEGER PRIMARY KEY AUTOINCREMENT, 
+    title VARCHAR(256) NOT NULL, 
+    release_year INTEGER
+);
+
+CREATE TABLE artist_album(
+    artist_id INT REFERENCES artist(id), 
+    album_id INT REFERENCES album(id)
+);
+
+SELECT * FROM album;
+SELECT * FROM album WHERE release_year > 1974 AND release_year < 1991;
+SELECT * FROM album WHERE title LIKE '%Super D%';
+SELECT * from album WHERE release_year IS NULL;
+
+
+SELECT album.title FROM album, artist, artist_album WHERE artist.id = artist_album.artist_id 
+AND album.id = artist_album.album_id AND artist.name = 'Han Solo';
+
+SELECT track.title FROM track, album 
+WHERE track.album_id = album.id AND album.title = 'Super Funky Album';
+
+SELECT AVG(release_year) FROM album, artist, artist_album WHERE artist.id = artist_album.artist_id 
+AND album.id = artist_album.album_id AND artist.name = 'Leia and the Ewoks';
+
+SELECT AVG(release_year) from album;
+
+SELECT COUNT(track.id) FROM track, album 
+WHERE album.id = track.album_id and album.title = 'Super Dubstep Album';
+
+SELECT COUNT(id) FROM artist;