select sum(point) from schedule_booking where idx_student= and (date>'20210123' or (date='20210123' and class_end>'1321'))

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>'20210123' or (date='20210123' and class_end>'1321'))' at line 1

error file : /my.page.php