Create a classrooms table with this definition (try using a multi-line SQL statement):

+-----------+-----------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------+-----------------+------+-----+---------+----------------+ | id | int(3) unsigned | NO | PRI | NULL | auto_increment | | room_num | int(4) unsigned | NO | UNI | NULL | | | course_id | int(3) unsigned | YES | MUL | NULL | | +-----------+-----------------+------+-----+---------+----------------+