题解 | SQL必知必会 SQL95
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
prod_name,
(select
sum(quantity)
from
OrderItems
where
OrderItems.prod_id = Products.prod_id
) as quant_sold
from
Products
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