题解 | 每个顾客购买的最新产品名称
每个顾客购买的最新产品名称
https://www.nowcoder.com/practice/6ff37adae90f490aafa313033a2dcff7
select customer_id,customer_name,product_name as latest_order from( select a.customer_id,customer_name,product_name,dense_rank()over(partition by a.customer_id order by order_date desc) as rk from orders a left join customers b using(customer_id) left join products c using(product_id))d where rk =1 order by customer_id
窗口函数排序+子查询挑出最新信息
这样才显得专业