select rel_id from cr_item_rels where item_id = :item_id order by order_n, rel_id update cr_item_rels set order_n = :i where rel_id = :rel_id select rel_id from cr_child_rels where parent_id = :item_id order by order_n, rel_id update cr_child_rels set order_n = :i where rel_id = :rel_id