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
http://www.nowcoder.com/practice/1c64fd9048364a58a8ffa541720359a4
select Products.prod_name,count(OrderItems.order_num) from Products left join OrderItems on Products.prod_id = OrderItems.prod_id group by Products.prod_name order by Products.prod_name
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