TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)

返回日期或日期時間表達式datetime_expr1和datetime_expr2之間的整數差。單位的結果由該單元參數給出。單位的合法值與那些在TIMESTAMPADD()函數的說明中列出相同。

mysql> SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01');
+---------------------------------------------------------+
| TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01')          |
+---------------------------------------------------------+
| 3                                                       |
+---------------------------------------------------------+
1 row in set (0.00 sec)