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