题解 | #确定哪些订单购买了 p#
确定哪些订单购买了 prod_id 为 BR01 的产品（一）
https://www.nowcoder.com/practice/b692b0174c0444fa9452aee2d082fbbb
1、子查询
select cust_id, order_date from Orders
where order_num in(
select order_num from OrderItems
where prod_id = "BR01"
)
order by order_date2、关联查询
select cust_id, order_date from Orders t
inner join OrderItems t1 on t.order_num = t1.order_num
where prod_id = "BR01"
order by order_date
