Hallo Tim, nun ganz einfach so: SELECT S.datetime_from, S.datetime_to, IFNULL(DATE_ADD(S.datetime_to, INTERVAL -1 SECOND), '0000-00-00 00:00:00') as datetime_to_enc FROM `stocks` S WHERE IFNULL(DATE_ADD(S.datetime_to, INTERVAL -1 SECOND), '0000-00-00 00:00:00') >= '2010-03-18 14:59:59' Gruß, Andreas