date_sub
Description
Syntax
DATETIME DATE_SUB(DATETIME date, INTERVAL expr type)
Subtract the specified time interval from the date
The date parameter is a valid date expression.
The expr parameter is the interval you want to add.
The type parameter can be the following values: YEAR, MONTH, DAY, HOUR, MINUTE, SECOND
example
mysql> select date_sub('2010-11-30 23:59:59', INTERVAL 2 DAY);
+-------------------------------------------------+
| date_sub('2010-11-30 23:59:59', INTERVAL 2 DAY) |
+-------------------------------------------------+
| 2010-11-28 23:59:59 |
+-------------------------------------------------+keywords
Date, date, date