select sum(point) from schedule_booking where idx_student= and (date>'20200119' or (date='20200119' and class_end>'1340'))

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>'20200119' or (date='20200119' and class_end>'1340'))' at line 1

error file : /my.page.php