select a.*,b.SumPoint from Expert_Topic_Index a,( select TopicID, Sum(Point) as SumPoint from expert_reply_index where PostUserName = 'ghj1976' Group by TopicID Having Sum(Point) > 0 ) as b where a.TopicID = b.TopicID
这里其实就是把一个查询的结果放到新的一个查询中了。
另外 Having 对分组结果进行的查询。 |
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