select sum(point) from schedule_booking where idx_student= and (date>'20200331' or (date='20200331' and class_end>'0716'))

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>'20200331' or (date='20200331' and class_end>'0716'))' at line 1

error file : /my.page.php