Create table: not null and default value : Create Table « Table Index « SQL / MySQL






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Create table: not null and default value

   
/*
mysql> Drop table Product;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE Product
    -> (
    ->    ID SMALLINT UNSIGNED NOT NULL,
    ->    Name VARCHAR(40) NOT NULL
    -> );
Query OK, 0 rows affected (0.05 sec)

mysql> Describe Product;
+-------+----------------------+------+-----+---------+-------+
| Field | Type                 | Null | Key | Default | Extra |
+-------+----------------------+------+-----+---------+-------+
| ID    | smallint(5) unsigned |      |     | 0       |       |
| Name  | varchar(40)          |      |     |         |       |
+-------+----------------------+------+-----+---------+-------+
2 rows in set (0.00 sec)

*/
Drop table Employee;

CREATE TABLE Employee
(
   ID SMALLINT UNSIGNED NOT NULL,
   YearBorn YEAR NOT NULL,
   CityBorn VARCHAR(40) NOT NULL DEFAULT 'Unknown'
);

Describe Employee;








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