<strong>Er zat een fout in je SQL query!</strong><br />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 link.item_id = item.id AND item.product_group_id =' at line 9<br />Query: <br /><i>SELECT productgroup.* FROM ws_ridder_item_year_link as link ,ws_ridder_item as item ,ws_ridder_productgroup as productgroup WHERE link.year_id = AND link.item_id = item.id AND item.product_group_id = productgroup.id GROUP BY productgroup.`name` </i><br /><br />