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 prod_name,a quant_sold
from Products
join(
select prod_id,sum(quantity) a
from OrderItems
group by prod_id) b
on Products.prod_id = b.prod_id
from Products
join(
select prod_id,sum(quantity) a
from OrderItems
group by prod_id) b
on Products.prod_id = b.prod_id
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