题解 | #网易云音乐推荐(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 goods_id id,name,weight,sum(t.count) total
from trans t left join goods g on t.goods_id=g.id
where weight<50
group by goods_id,name,weight
having total>20
order by goods_id
from trans t left join goods g on t.goods_id=g.id
where weight<50
group by goods_id,name,weight
having total>20
order by goods_id
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