题解 | #从 Products 表中检索所有的产品名称以及
从 Products 表中检索所有的产品名称以及对应的销售总数
https://www.nowcoder.com/practice/2b289b78de1546f38fd24e17e56f1bec
select P.prod_name,sum(O.quantity) as quant_sold from Products as P inner join OrderItems as O on P.prod_id = O.prod_id group by P.prod_name;