题解 | #返回产品名称和每一项产品的总订单数#
返回产品名称和每一项产品的总订单数
https://www.nowcoder.com/practice/1c64fd9048364a58a8ffa541720359a4
select P.prod_name,COUNT(OI.order_num) as Orders from Products P left join OrderItems OI on P.prod_id = OI.prod_id group by P.prod_name order by P.prod_name;