select CategoryID, istopic from ( SELECT CategoryID, EXISTS (SELECT * from topics_equivalence te WHERE te.categoryid=acl.categoryid) as istopic FROM eZArticle_ArticleCategoryLink acl WHERE acl.ArticleID=64833 ) as subquery select CategoryID, istopic from ( SELECT CategoryID, EXISTS (SELECT * from topics_equivalence te WHERE te.categoryid=acl.categoryid) as istopic FROM eZArticle_ArticleCategoryLink acl WHERE acl.ArticleID=64829 ) as subquery select CategoryID, istopic from ( SELECT CategoryID, EXISTS (SELECT * from topics_equivalence te WHERE te.categoryid=acl.categoryid) as istopic FROM eZArticle_ArticleCategoryLink acl WHERE acl.ArticleID=64831 ) as subquery

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