3张表关联

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3张表关联

SELECT TopicId      ,SoftContentId  FROM Relevance where topicId=1select  a.ID,a.Title ,a.ShuoImsge ,a.SmallClassId ,a.ShortIntro,b.commodity  from softContent as a inner join MyCommodityCategory as b on a.smallClassId=b.id inner join Relevance as con a.id=c.SoftContentIdwhere c.topicId=1 order by c.RelevanceId desc


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