题解 | #返回顾客名称和相关订单号以及每个订单的总价#
返回顾客名称和相关订单号以及每个订单的总价
https://www.nowcoder.com/practice/4dda66e385c443d8a11570a70807d250
select a.cust_name, b.order_num, sum(quantity*item_price) as OrderTotal from Customers a, Orders b, OrderItems c where a.cust_id = b.cust_id and b.order_num = c.order_num group by cust_name,order_num order by cust_name,order_num
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拖拉机被发明出来之后，就不需要农民了吗？农民还是需要的，但不需要这么多了，另外对农民的要求也变高了，需要会开拖拉机。