题解 | 从 Products 表中检索所有的产品名称以及对应的销售总数
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 join OrderItems as O on O.prod_id = P.prod_id group by prod_name;