Error in query SELECT id, DATE_FORMAT(time, '%H:%i') as tm, DATE_FORMAT(time, '%d') as day, DATE_FORMAT(time, '%c') as mnth, title, contact, type, city, com FROM eng_trade_buy WHERE id>0 AND type=3 AND is_hidden=0 AND is_removed=0 AND end_time>now() ORDER BY time DESC LIMIT 0,39:Unknown column 'is_hidden' in 'where clause'