Overzicht van de motivatie van het per schooljaar.

Database Error; SQL: SELECT DISTINCT `t`.* FROM `wpop_pods_klas` AS `t` LEFT JOIN `wpop_podsrel` AS `rel_school` ON `rel_school`.`field_id` = 6592 AND `rel_school`.`item_id` = `t`.`id` LEFT JOIN `wpop_pods_school` AS `school` ON `school`.`id` = `rel_school`.`related_item_id` WHERE ( `school`.`id` = ) ORDER BY `t`.`code`, `t`.`id` LIMIT 0, 15; Response: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY `t`.`code`, `t`.`id' at line 14