/*mysql> Drop table Product;mysql> CREATE TABLE Product -> ( -> ID SMALLINT UNSIGNED NOT NULL PRIMARY KEY, -> ModelID SMALLINT UNSIGNED NOT NULL -> );Query OK, 0 rows affected (0.05 sec)mysql> ALTER TABLE Product -> ADD UNIQUE (ID, ModelID);Query OK, 0 rows affected (0.15 sec)Records: 0 Duplicates: 0 Warnings: 0mysql> Describe Product;+---------+----------------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+---------+----------------------+------+-----+---------+-------+| ID | smallint(5) unsigned | | PRI | 0 | || ModelID | smallint(5) unsigned | | | 0 | |+---------+----------------------+------+-----+---------+-------+2 rows in set (0.01 sec)*/Drop table Product;CREATE TABLE Product( ID SMALLINT UNSIGNED NOT NULL PRIMARY KEY, ModelID SMALLINT UNSIGNED NOT NULL);ALTER TABLE ProductADD UNIQUE (ID, ModelID);Describe Product;
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