SELECT ADDTIME(TIME(\'23:59:59\'), TIME(\'02:00:00\'));
This currently returns: \'25:59:59\' I want it to return: \'01:59:
Not sure if that's the best solution, but it seems to work :
SELECT TIME((ADDTIME(TIME('23:59:59'), TIME('02:00:00')))%(TIME('24:00:00')));