题解 | #确定哪些订单购买了 prod_id 为 BR01 的产品（一）#
确定哪些订单购买了 prod_id 为 BR01 的产品（一）
http://www.nowcoder.com/practice/b692b0174c0444fa9452aee2d082fbbb
获取到prod_id="BR01"的订单号
select order_num from OrderItems where prod_id="BR01"
把需要获取的内容写在外层，将订单编号的条件进行子查询 select cust_id,order_date from Orders where order_num in (select order_num from OrderItems where prod_id="BR01")
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