select tblMandators.name as Mandant, tblItems.titleForLearners + ' (' + tblItems.title + ')' as Titel, count(distinct user_id) as 'Unterschiedliche Nutzer', count(user_id) as 'Aufrufe (Gesamt)', sum(durationSeconds) as 'Aufrufdauer (Gesamt)' from tblStatsThemeSessions inner join tblThemes on tblThemes.id=tblStatsThemeSessions.theme_id INNER JOIN tblItems ON tblItems.id = tblThemes.id inner join tblMandators on tblMandators.id=tblThemes.mandator_id where tblItems.deleted IS NULL AND (tblStatsThemeSessions.theme_id is not null) and (tblStatsThemeSessions.startTime>=@startDate and tblStatsThemeSessions.startTime<=dateadd(day,1,@endDate)) and (tblStatsThemeSessions.durationSeconds is not null) group by tblStatsThemeSessions.theme_id, tblItems.titleForLearners, tblItems.title, tblMandators.name order by Mandant, Titel