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 having sum(count)>20) t
on g.id = t.goods_id
where g.weight<50
order by g.id
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