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) orders
from
Products p
left join OrderItems oi on p.prod_id = oi.prod_id
group by
prod_name
order by
prod_name