题解 | #返回每个顾客不同订单的总金额#
返回每个顾客不同订单的总金额
https://www.nowcoder.com/practice/ce313253a81c4947b20e801cd4da7894
SELECT
cust_id,(
SELECT
SUM(order_total)
FROM (
SELECT order_num,SUM(item_price*quantity) AS order_total
FROM OrderItems
GROUP BY order_num
) AS OT
WHERE OT.order_num=O.order_num
) AS total_ordered
FROM
Orders O
ORDER BY
total_ordered DESC