WHERE ((Posete.Kupac)=Forms!Form1!Combo2 Or (Forms!Form1!Combo2) & "" ="") and ((IdGrada)=Forms!Form1!Combo4 Or (Forms!Form1!Combo4) & "" ="") and ((Datum >= Forms!Form1!od) or Forms!Form1!od & "" = "") and ((Datum <= Forms!Form1!do) or Forms!Form1!do & "" = "");