timestampadd
description
Syntax
DATETIME TIMESTAMPADD(unit, interval, DATETIME datetime_expr)
将整数表达式间隔添加到日期或日期时间表达式datetime_expr中。
interval的单位由unit参数给出，它应该是下列值之一:
SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, or YEAR。
example
mysql> SELECT TIMESTAMPADD(MINUTE,1,'2019-01-02');
+------------------------------------------------+
| timestampadd(MINUTE, 1, '2019-01-02 00:00:00') |
+------------------------------------------------+
| 2019-01-02 00:01:00 |
+------------------------------------------------+
mysql> SELECT TIMESTAMPADD(WEEK,1,'2019-01-02');
+----------------------------------------------+
| timestampadd(WEEK, 1, '2019-01-02 00:00:00') |
+----------------------------------------------+
| 2019-01-09 00:00:00 |
+----------------------------------------------+keywords
TIMESTAMPADD