text: ------------------------------------------------------------------------------------
  --
  -- Filename: artist_schema_1.sql
  --
  -- Date: Fri Jan 18 00:38:28 CET 2019
  --
  ------------------------------------------------------------------------------------
  
  CREATE TABLE artist (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, name TEXT);
  CREATE TABLE album (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, artist_id INTEGER, name TEXT, FOREIGN KEY(artist_id) REFERENCES artist(id) ON DELETE CASCADE ON UPDATE CASCADE);
  CREATE TABLE track (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, album_id INTEGER, FOREIGN KEY(album_id) REFERENCES album(id) ON DELETE CASCADE ON UPDATE SET NULL);
  