一个SQL语句获得某人参与的帖子及在该帖得分总和
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。
