ADDTIME(expr1,expr2)

ADDTIME()將expr2到expr1並返回結果。expr1是一個時間或日期時間表達式，expr2是一個時間表達式。

mysql> SELECT ADDTIME('1997-12-31 23:59:59.999999','1 1:1:1.000002');
+---------------------------------------------------------+
| DATE_ADD('1997-12-31 23:59:59.999999','1 1:1:1.000002') |
+---------------------------------------------------------+
| 1998-01-02 01:01:01.000001                              |
+---------------------------------------------------------+
1 row in set (0.00 sec)