SELECT DATE(NOW()-INTERVAL 15 DAY)
Seznam jednotek viz http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-add
SELECT DATE(NOW()-INTERVAL 15 DAY)
Seznam jednotek viz http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-add