Crystal Report and multiple datatables merge problem

Hi,
I have these two select queries and I used them for making a new select in access. The first two queries I used for filling the two datatables in dataset. I want to use the third, the derived query for filling the CrystalReport.

1. Here is the first query:
SELECT MAGACIN.GBR, MAGACIN.DATA, NOVI.AB, Max(IIf([sifra]='0992201',[kol],Null)) AS Addblue, Max(IIf([sifra]='0999001',[kol],Null)) AS Antifriz, Max(IIf([sifra]='0991000',[kol],Null)) AS Gorivo, Max(IIf([sifra]='0993050',[kol],Null)) AS Motmaslo
FROM MAGACIN INNER JOIN NOVI ON MAGACIN.GBR = NOVI.GBR
GROUP BY MAGACIN.GBR, MAGACIN.DATA, NOVI.AB
HAVING (((MAGACIN.GBR)=[@gbr1]) AND ((MAGACIN.DATA)>=[data1] And (MAGACIN.DATA)<=[data2]) AND ((NOVI.AB)=[@ab1] Or (NOVI.AB)=[@ab2]))
ORDER BY MAGACIN.DATA;

2. The second query:
SELECT NALOG1.GBRV, NALOG1.DATA, Min(IIf([NALOG1.GBRV]=[@gbr1] And ((NOVI.AB)=[@ab1] Or (NOVI.AB)=[@ab2]) And [NALOG1].[POCKM]>0,[NALOG1.POCKM],Null)) AS pockm, Max(IIf([NALOG1.GBRV]=[@gbr1] And ((NOVI.AB)=[@ab1] Or (NOVI.AB)=[@ab2]) And ([NALOG1.DATA]>=[@data1]) And ([NALOG1.DATA]<=[@data2]),[NALOG1.KRAJKM],Null)) AS krajkm, Max(NOVI.DATAP) AS Poslprov, Max(NOVI.DATAS) AS Poslserv, Sum(NALOG1.km) AS sumkm, Max(NOVI.KMP1) AS KMP, Max(NOVI.KMS1) AS KMS
FROM NALOG1 INNER JOIN NOVI ON NALOG1.GBRV = NOVI.GBR
WHERE (((NALOG1.GBRV)>=[@gbr1]) AND ((NOVI.AB)=[@ab1] Or (NOVI.AB)=[@ab2]))
GROUP BY NALOG1.GBRV, NALOG1.DATA, NOVI.KMP1, NOVI.KMP2, NOVI.KMS1, NOVI.KMS2
HAVING (((NALOG1.GBRV)=[@gbr1]) AND ((NALOG1.DATA)>=[@data1] And (NALOG1.DATA)<=[@data2]));


and I create this query (which works in access) which uses the first and the second query for filling the crystalreport
SELECT NalogNov1.DATA, Max(IIf([MagNov1].[DATA]=[NalogNov1].[DATA],[MagNov1].[Gorivo],0)) AS Gorivo1, Max(IIf([MagNov1].[DATA]=[NalogNov1].[DATA],[MagNov1].[Addblue],0)) AS Addblue1, Max(IIf([MagNov1].[DATA]=[NalogNov1].[DATA],[MagNov1].[Antifriz],0)) AS Antifriz1, Max((IIf([MagNov1].[DATA]=[NalogNov1].[DATA],[MagNov1].[Motmaslo],0))) AS Motmaslo1, Min(NalogNov1.pockm) AS MinOfpockm, Max(NalogNov1.krajkm) AS MaxOfkrajkm, [krajkm]-[pockm] AS RAZLIKA, NalogNov1.Poslprov, NalogNov1.Poslserv, NalogNov1.KMS, NalogNov1.KMP
FROM NalogNov1 LEFT JOIN MagNov1 ON NalogNov1.GBRV = MagNov1.GBR
WHERE (((NalogNov1.GBRV)=[MagNov1].[GBR]))
GROUP BY NalogNov1.DATA, [krajkm]-[pockm], NalogNov1.Poslprov, NalogNov1.Poslserv, NalogNov1.KMS, NalogNov1.KMP
ORDER BY NalogNov1.DATA;


But I don't know how to use this in C# for combining the both datatables from the dataset and to get the same result as in access. Can anybody help me please?
thanks