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Anonymous's avatar
Anonymous
Not applicable
6 years ago
Solved

Lookup in Power BI using DAX

Hi All, I have a scenario where I have two table. Table A: Users and Access field Table B: Users and AuthVariable Now the logic is , for the user in Table B, look for the "AuthVariabl...
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  • Greg_Deckler's avatar
    Greg_Deckler
    6 years ago

    Thanks Anonymous , this was fun.

     

    TableC = 
    VAR __AccessCodes = DISTINCT('TableA'[Access])
    VAR __TableB = 'TableB'
    VAR __TableA = 'TableA'
    VAR __Table = GENERATE(FILTER(__TableB,[AuthVariable]<>"Zall"),__AccessCodes)
    VAR __TableZall = GENERATE(FILTER(__TableB,[AuthVariable]=="Zall"),__AccessCodes)
    VAR __TableZallFinal = SELECTCOLUMNS(__TableZall,"User",[User],"Access",[Access])
    VAR __TableFinal = 
        SELECTCOLUMNS(
            FILTER(
                ADDCOLUMNS(
                    __Table,
                    "__AuthVariable",RIGHT([AuthVariable],1),
                    "__Access",LEFT([Access],1)
                ),
                [__Access] = [__AuthVariable]
            ),
            "User",[User],
            "Access",[Access]
        )
RETURN
    UNION(__TableA, __TableFinal, __TableZallFinal)
Greg_Deckler's avatar
Greg_Deckler
Icon for Community Champion rankCommunity Champion
6 years ago

Thanks Anonymous , this was fun.

 

TableC = 
    VAR __AccessCodes = DISTINCT('TableA'[Access])
    VAR __TableB = 'TableB'
    VAR __TableA = 'TableA'
    VAR __Table = GENERATE(FILTER(__TableB,[AuthVariable]<>"Zall"),__AccessCodes)
    VAR __TableZall = GENERATE(FILTER(__TableB,[AuthVariable]=="Zall"),__AccessCodes)
    VAR __TableZallFinal = SELECTCOLUMNS(__TableZall,"User",[User],"Access",[Access])
    VAR __TableFinal = 
        SELECTCOLUMNS(
            FILTER(
                ADDCOLUMNS(
                    __Table,
                    "__AuthVariable",RIGHT([AuthVariable],1),
                    "__Access",LEFT([Access],1)
                ),
                [__Access] = [__AuthVariable]
            ),
            "User",[User],
            "Access",[Access]
        )
RETURN
    UNION(__TableA, __TableFinal, __TableZallFinal)
  • Anonymous's avatar
    Anonymous
    Not applicable
    6 years ago

    Thank you for the quick response. I will try to implement the same and update the results here.