如何更改从 ROLLUP 创建的最后一行的文本

问：

我创建了这个SQL查询：

SELECT
    orders.order_id AS "Nr. zamówienia",
    orders.order_date AS "Data zamówienia",
    products.name AS "Nazwa produtku", 
    products.price AS "Cena produtku", 
    orders.count AS "Ilość", 
    clients.client_id AS "Numer klienta",
    clients.first_name AS "Imię", 
    clients.last_name AS "Nazwisko",
    SUM(orders.count * products.price) AS "Cena Łączna"
FROM orders
INNER JOIN clients ON orders.client_id = clients.client_id
INNER JOIN products ON orders.product_id = products.product_id
WHERE orders.client_id = 215234
GROUP BY orders.order_id WITH ROLLUP

并得到这个结果：resuult of query

是否可以将最后一行更改为仅在“Nazwisko”列中显示“Sum：”，而不显示加倍的最后一行？