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mysql>
mysql> CREATE TABLE Models
-> (
-> ModelID SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
-> Name VARCHAR(40) NOT NULL,
-> PRIMARY KEY (ModelID)
-> );
Query OK, 0 rows affected (0.02 sec)
mysql>
mysql> CREATE TABLE Orders
-> (
-> ID SMALLINT UNSIGNED NOT NULL PRIMARY KEY,
-> ModelID SMALLINT UNSIGNED NOT NULL,
-> Description VARCHAR(40),
-> FOREIGN KEY (ModelID) REFERENCES Models (ModelID)
-> ON DELETE CASCADE ON UPDATE CASCADE
-> );
Query OK, 0 rows affected (0.05 sec)
mysql>
mysql>
mysql> desc Models;
+---------+----------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+----------------------+------+-----+---------+----------------+
| ModelID | smallint(5) unsigned | NO | PRI | NULL | auto_increment |
| Name | varchar(40) | NO | | | |
+---------+----------------------+------+-----+---------+----------------+
2 rows in set (0.00 sec)
mysql>
mysql> desc Orders;
+-------------+----------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+----------------------+------+-----+---------+-------+
| ID | smallint(5) unsigned | NO | PRI | | |
| ModelID | smallint(5) unsigned | NO | MUL | | |
| Description | varchar(40) | YES | | NULL | |
+-------------+----------------------+------+-----+---------+-------+
3 rows in set (0.01 sec)
mysql>
mysql> drop table Orders;
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> drop table Models;
Query OK, 0 rows affected (0.00 sec)
mysql>
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