在應用時,經常要使用這兩個函數TIMESTAMPDIFF和TIMESTAMPADD。
一,TIMESTAMPDIFF
語法:
TIMESTAMPDIFF(interval,datetime_expr1,datetime_expr2)。
說明:
返回日期或日期時間表達式datetime_expr1 和datetime_expr2the 之間的整數差。其結果的單位由interval 參數給出。該參數必須是以下值的其中一個:
- FRAC_SECOND。表示間隔是毫秒
- SECOND。秒
- MINUTE。分鐘
- HOUR。小時
- DAY。天
- WEEK。星期
- MONTH。月
- QUARTER。季度
- YEAR。年
- mysql> select TIMESTAMPDIFF(day,'2012-08-24','2012-08-30');
- +----------------------------------------------+
- | TIMESTAMPDIFF(day,'2012-08-24','2012-08-30') |
- +----------------------------------------------+
- | 6 |
- +----------------------------------------------+
- 1 row in set (0.00 sec)
- mysql> select TIMESTAMPDIFF(MINUTE,'2012-08-24 09:00:00','2012-08-30 12:00:00');
- +-------------------------------------------------------------------+
- | TIMESTAMPDIFF(MINUTE,'2012-08-24 09:00:00','2012-08-30 12:00:00') |
- +-------------------------------------------------------------------+
- | 8820 |
- +-------------------------------------------------------------------+
- 1 row in set (0.01 sec)
二,TIMESTAMPADD
- mysql> select TIMESTAMPADD(MINUTE,8820,'2012-08-24 09:00:00');
- +-------------------------------------------------+
- | TIMESTAMPADD(MINUTE,8820,'2012-08-24 09:00:00') |
- +-------------------------------------------------+
- | 2012-08-30 12:00:00 |
- +-------------------------------------------------+
- 1 row in set (0.00 sec)
- 轉自:https://blog.csdn.net/zmxiangde_88/article/details/8011661