Create table: primary key : Create Table « Table Index « SQL / MySQL






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Create table: primary key

   
/*
mysql> Drop table Orders;

mysql> CREATE TABLE Orders
    -> (
    ->    OrderID SMALLINT UNSIGNED NOT NULL PRIMARY KEY,
    ->    ModelID SMALLINT UNSIGNED NOT NULL,
    ->    ModelDescrip VARCHAR(40)
    -> );
Query OK, 0 rows affected (0.05 sec)

mysql> Describe Orders;
+--------------+----------------------+------+-----+---------+-------+
| Field        | Type                 | Null | Key | Default | Extra |
+--------------+----------------------+------+-----+---------+-------+
| OrderID      | smallint(5) unsigned |      | PRI | 0       |       |
| ModelID      | smallint(5) unsigned |      |     | 0       |       |
| ModelDescrip | varchar(40)          | YES  |     | NULL    |       |
+--------------+----------------------+------+-----+---------+-------+
3 rows in set (0.01 sec)


*/
Drop table Orders;

CREATE TABLE Orders
(
   OrderID SMALLINT UNSIGNED NOT NULL PRIMARY KEY,
   ModelID SMALLINT UNSIGNED NOT NULL,
   ModelDescrip VARCHAR(40)
);

Describe Orders;








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