SELECT IIf(IsNull([OC1])," ",GT([OC1],0)) AS Ocjena1, IIf(IsNull([OC2])," ",GT([OC2],0)) AS Ocjena2, IIf(IsNull([OC3])," ",GT([OC3],0)) AS Ocjena3, tblSvjedodzba.Ocjena1 AS OC1, tblSvjedodzba.Ocjena2 AS OC2, tblSvjedodzba.Ocjena3 AS OC3
FROM tblSvjedodzba;