我们如何在带有CREATE TABLE语句的MySQL表中具有多个virtuals GENERATED COLUMNS?

很可能在MySQL表中添加多个虚拟生成的列。可以通过以下示例进行说明-

示例

mysql> Create table profit(cost int, price int, profit int AS (price-cost), price_revised int AS (price-2));

mysql> Describe profit;
+---------------+---------+------+-----+---------+-------------------+
| Field         | Type    | Null | Key | Default | Extra             |
+---------------+---------+------+-----+---------+-------------------+
| cost          | int(11) | YES  |     | NULL    |                   |
| price         | int(11) | YES  |     | NULL    |                   |
| profit        | int(11) | YES  |     | NULL    | VIRTUAL GENERATED |
| price_revised | int(11) | YES  |     | NULL    | VIRTUAL GENERATED |
+---------------+---------+------+-----+---------+-------------------+
4 rows in set (0.00 sec)

mysql> Insert into profit(Cost, Price) values(100,110);

mysql> Insert into profit(Cost, Price) values(200,220);

mysql> Select * from profit;
+------+-------+--------+---------------+
| cost | price | profit | price_revised |
+------+-------+--------+---------------+
| 100  | 110   | 10     | 108           |
| 200  | 220   | 20     | 218           |
+------+-------+--------+---------------+
2 rows in set (0.00 sec)
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