DATE_ADD
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Syntax
DATE_ADD(date,INTERVAL expr unit)
Contents
Description
Performs date arithmetic. The date argument specifies the
starting date or datetime value. expr is an expression specifying the
interval value to be added to the starting date. expr is a
string; it may start with a "-
" for negative intervals. unit is a
keyword indicating the units in which the expression should be interpreted. See Date and Time Units for a complete list of permitted units.
Examples
SELECT '2008-12-31 23:59:59' + INTERVAL 1 SECOND; +-------------------------------------------+ | '2008-12-31 23:59:59' + INTERVAL 1 SECOND | +-------------------------------------------+ | 2009-01-01 00:00:00 | +-------------------------------------------+
SELECT INTERVAL 1 DAY + '2008-12-31'; +-------------------------------+ | INTERVAL 1 DAY + '2008-12-31' | +-------------------------------+ | 2009-01-01 | +-------------------------------+
SELECT '2005-01-01' - INTERVAL 1 SECOND; +----------------------------------+ | '2005-01-01' - INTERVAL 1 SECOND | +----------------------------------+ | 2004-12-31 23:59:59 | +----------------------------------+
SELECT DATE_ADD('2000-12-31 23:59:59', INTERVAL 1 SECOND); +----------------------------------------------------+ | DATE_ADD('2000-12-31 23:59:59', INTERVAL 1 SECOND) | +----------------------------------------------------+ | 2001-01-01 00:00:00 | +----------------------------------------------------+
SELECT DATE_ADD('2010-12-31 23:59:59', INTERVAL 1 DAY); +-------------------------------------------------+ | DATE_ADD('2010-12-31 23:59:59', INTERVAL 1 DAY) | +-------------------------------------------------+ | 2011-01-01 23:59:59 | +-------------------------------------------------+
SELECT DATE_ADD('2100-12-31 23:59:59', INTERVAL '1:1' MINUTE_SECOND); +---------------------------------------------------------------+ | DATE_ADD('2100-12-31 23:59:59', INTERVAL '1:1' MINUTE_SECOND) | +---------------------------------------------------------------+ | 2101-01-01 00:01:00 | +---------------------------------------------------------------+
SELECT DATE_ADD('1900-01-01 00:00:00', INTERVAL '-1 10' DAY_HOUR); +------------------------------------------------------------+ | DATE_ADD('1900-01-01 00:00:00', INTERVAL '-1 10' DAY_HOUR) | +------------------------------------------------------------+ | 1899-12-30 14:00:00 | +------------------------------------------------------------+
SELECT DATE_ADD('1992-12-31 23:59:59.000002', INTERVAL '1.999999' SECOND_MICROSECOND); +--------------------------------------------------------------------------------+ | DATE_ADD('1992-12-31 23:59:59.000002', INTERVAL '1.999999' SECOND_MICROSECOND) | +--------------------------------------------------------------------------------+ | 1993-01-01 00:00:01.000001 | +--------------------------------------------------------------------------------+
See Also
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