要在表中新增MySQL 儲存的生成列，我們可以使用與新增列相同的語法，只需在資料類型後面新增“AS(表達式)”即可。其語法如下 -
ALTER TABLE table_name ADD COLUMN column_name AS(expression)STORED;
mysql> ALTER TABLE employee_data_stored ADD COLUMN FULLName Varchar(200) AS (CONCAT_WS(" ", 'First_name','Last_name')) STORED;
Query OK, 2 rows affected (1.23 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> Describe employee_data_stored;
+------------+--------------+------+-----+---------+------------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+------------------+
| ID | int(11) | NO | PRI | NULL | auto_increment |
| First_name | varchar(50) | NO | | NULL | |
| Last_name | varchar(50) | NO | | NULL | |
| FULL_NAME | varchar(90) | YES | | NULL | STORED GENERATED |
| FULLName | varchar(200) | YES | | NULL | STORED GENERATED |
+------------+--------------+------+-----+---------+------------------+
5 rows in set (0.00 sec)以上是我們如何更改表以添加 MySQL 儲存的生成列？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
