题解 | INNER JOIN
确定哪些订单购买了 prod_id 为 BR01 的产品（二）
https://www.nowcoder.com/practice/999aa31a9a504c60baa088d90d82e64d
SELECT cust_id,order_date FROM OrderItems ot inner join Orders o on ot.order_num=o.order_num where prod_id="BR01" order by order_date ASC
