select sum(point) from schedule_booking where idx_student= and (date>'20191206' or (date='20191206' and class_end>'0932'))

1064 : You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'and (date>'20191206' or (date='20191206' and class_end>'0932'))' at line 1

error file : /my.page.php