SELECT t_add_date,
SUBSTRING(t_add_date :: CHARACTER varying, 1, 19)
FROM TABLE
WHERE t_add_date & lt;
NOW() - '1 DAY' :: interval t_add_date SUBSTRING
2010-03-10 21:26:49.928445 2010-03-10 21:26:49
2010-03-10 21:26:49.928445 2010-03-10 21:26:49