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
http://www.nowcoder.com/practice/ce313253a81c4947b20e801cd4da7894
select o.cust_id as cust_id, tb.total_ordered as total_ordered from ( select order_num, sum(item_price * quantity) as total_ordered from OrderItems group by order_num )tb , Orders o where tb.order_num =o.order_num order by total_ordered DESC;
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