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select distinct us.displayName as UserName, -- Jmeno uzivatele PNt.Name, PN.CreationDate from users us inner join PostNotices PN on us.id=PN.owneruserID inner join PostNoticeTypes PNt on PN.PostNoticeTypeId=PNt.ID where US.ID is not null -- dvojitá kontrola mimo join order by us.displayName asc, PN.CreationDate desc