DATE_SUB
Subtracts the given interval of time to a date or datetime object.
Syntax
DATE_SUB (dateobj, INTERVAL expr unit) SUBDATE (dateobj, INTERVAL expr unit) SUBDATE (dateobj, days)
Arguments
dateobj: a valid date, datetime, or parsable date string
expr: the number of units to add if unit is a simple type, or a string representation of the units to add if unit is a complex type. Can be negative.
days: number of days to subtract. Can be negative.
See DATE_ADD for a description of unit.
Return Type
Date or datetime object. If dateobj is not a valid date, returns NULL.
Examples
SELECT DATE_SUB('2010-04-02', INTERVAL 1 WEEK);
****
+-----------------------------------------+
| DATE_SUB("2010-04-02", INTERVAL 1 WEEK) |
+-----------------------------------------+
| 2010-03-26 |
+-----------------------------------------+