-- Next Operation SELECT m.operation_no FROM Shop_Order_Operation_Tab m WHERE operation_no = ( SELECT MIN(s.operation_no) FROM Shop_Order_Operation_Tab s WHERE s.operation_no > 10 AND s.order_no = m.order_no ) AND order_no = 'SO1905150001' -- Last Operation SELECT m.operation_no FROM Shop_Order_Operation_Tab m WHERE operation_no = ( SELECT MAX(s.operation_no) FROM Shop_Order_Operation_Tab s WHERE s.operation_no < 20 AND s.order_no = m.order_no ) AND order_no = 'SO1905150001'