一,TIMESTAMPDIFFmysql
語法:sql
TIMESTAMPDIFF(interval,datetime_expr1,datetime_expr2)。date
說明:select
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。該參數必須是如下值的其中一個:語法
FRAC_SECOND。表示間隔是毫秒im
使用以下:datetime
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)時間
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)time
二,TIMESTAMPADD參數
語法:
TIMESTAMPADD(interval,int_expr,datetime_expr)
說明:
將整型表達式int_expr 添加到日期或日期時間表達式 datetime_expr中。式中的interval和上文中列舉的取值是同樣的。
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)