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 prod_name,orders from ( select prod_name, oi.prod_id,count(order_num) as orders from Products p left join OrderItems oi on p.prod_id = oi.prod_id group by prod_name, oi.prod_id) as prod_order order by prod_name;