mysql> mysql> desc help_category; +--------------------+----------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------------+----------------------+------+-----+---------+-------+ | help_category_id | smallint(5) unsigned | NO | PRI | | | | name | char(64) | NO | UNI | | | | parent_category_id | smallint(5) unsigned | YES | | NULL | | | url | char(128) | NO | | | | +--------------------+----------------------+------+-----+---------+-------+ 4 rows in set (0.01 sec) mysql> mysql> use test Database changed