我们如何使用 CREATE TABLE 语句在 MySQL 表中存储多个生成列？

很可能在 MySQL 表中添加多个存储的生成列。可以用以下示例来说明：

示例

mysql> Create table profit1(cost int, price int, profit int AS (price-cost) STORED, price_revised int AS (price-2) STORED); Query OK, 0 rows affected (0.36 sec) mysql> Describe profit1; +---------------+---------+------+-----+---------+------------------+ | Field         | Type    | Null | Key | Default | Extra            | +---------------+---------+------+-----+---------+------------------+ | cost          | int(11) | YES  |     | NULL    |                  | | price         | int(11) | YES  |     | NULL    |                  | | profit        | int(11) | YES  |     | NULL    | STORED GENERATED | | price_revised | int(11) | YES  |     | NULL    | STORED GENERATED | +---------------+---------+------+-----+---------+------------------+ 4 rows in set (0.00 sec) mysql> Insert into profit1(Cost, Price) values(100,110); Query OK, 1 row affected (0.09 sec) mysql> Insert into profit1(Cost, Price) values(200,220); Query OK, 1 row affected (0.09 sec) mysql> Select * from profit1; +------+-------+--------+---------------+ | cost | price | profit | price_revised | +------+-------+--------+---------------+ | 100  | 110   | 10     | 108           | | 200  | 220   | 20     | 218           | +------+-------+--------+---------------+ 2 rows in set (0.00 sec)登录后复制