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
http://www.nowcoder.com/practice/2b289b78de1546f38fd24e17e56f1bec
SELECT a.prod_name,b.quant_sold FROM Products a INNER JOIN (SELECT prod_id,SUM(quantity) AS quant_sold FROM OrderItems GROUP BY prod_id) b ON a.prod_id = b.prod_id;