minor amend

lab-2/music-store-app/sql/schema.sql

@@ -10,8 +10,9 @@ CREATE TABLE Genre (
 );
 
 /* Define table for storing act (i.e. a group or solo artist)
-ON DELETE CASCADE not needed in this
-case as a Band does not HAVE to have an associated genre */
+ON DELETE CASCADE not used in this case as we don't want bands 
+being deleted if their genre is deleted. We'd rather an error
+was raised. */
 CREATE TABLE Band (
 	id INT AUTO_INCREMENT,
 	name VARCHAR(50) NOT NULL,