题解 | #商品交易(网易校招笔试真题)#
商品交易(网易校招笔试真题)
http://www.nowcoder.com/practice/f257dfc1b55e42e19eec004aa3cb4174
select g.id,g.name,g.weight,t.total from goods g
left join (select goods_id,sum(count) total from trans group by goods_id) t
on g.id = t.goods_id where t.total > 20 and g.weight < 50
order by g.id;
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