SELECT tK.cName AS 'Kundengruppe', CAST(tAA.fIntervall AS DECIMAL(30, 2)) AS 'Abnahmeinterval', CAST(tAA.fMindestabnahme AS DECIMAL(30, 2)) AS 'Mindestabnahme' FROM dbo.tArtikelAbnahme AS tAA
LEFT JOIN dbo.tKundengruppe AS tK ON tK.kKundenGruppe = tAA.kKundengruppe
WHERE kArtikel = @Key