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esilva32's avatar
esilva32
Frequent Visitor
7 years ago
Solved

DAX Calculation

Hello guys I am performing a calculation with DAX on power BI and would like to know if anyone could help me. My data is in table A and the results I want are in table B. Best regards, Thank you ...
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  • AlB's avatar
    AlB
    7 years ago

    Hi esilva32

     

    It certainly looks like it would be easier to do this in the query editor. If you do need to do it in DAX, try this. Create a new calculated table:

     

    TableB = 
VAR _BaseTable =
    ADDCOLUMNS (
        GENERATE (
            DISTINCT ( TableA[Id] );
            GENERATESERIES (
                CALCULATE ( DISTINCT ( TableA[StartDate] ) );
                CALCULATE ( DISTINCT ( TableA[EndDate] ) )
            )
        );
        "TempVal"; CALCULATE ( DISTINCT ( TableA[Value] ) )
    )
VAR _Dates =
    DISTINCT ( SELECTCOLUMNS ( _BaseTable; "Date"; [Value] ) )
VAR _ResTable =
    ADDCOLUMNS (
        _Dates;
        "Total Value"; SUMX ( _BaseTable; IF ( [Value] = [Date]; [TempVal] ) )
    )
RETURN
    _ResTable

     

     

     

  • esilva32's avatar
    esilva32
    7 years ago

    Hello guys

    Thank you for your help. @AIB thank you, worked perfectly, thanks for the help.

    Regards, Portugal.

  • AlB's avatar
    AlB
    7 years ago

    esilva32

     

    Minor modification:

     

    TableB =
VAR _BaseTable =
    ADDCOLUMNS (
        GENERATE (
            DISTINCT ( TableA[Id] );
            GENERATESERIES (
                CALCULATE ( DISTINCT ( TableA[StartDate] ) );
                MIN ( TODAY (); CALCULATE ( DISTINCT ( TableA[EndDate] ) ) )
            )
        );
        "TempVal"; CALCULATE ( DISTINCT ( TableA[Value] ) )
    )
VAR _Dates =
    DISTINCT ( SELECTCOLUMNS ( _BaseTable; "Date"; [Value] ) )
VAR _ResTable =
    ADDCOLUMNS (
        _Dates;
        "Total Value"; SUMX ( _BaseTable; IF ( [Value] = [Date]; [TempVal] ) )
    )
RETURN
    _ResTable
Greg_Deckler's avatar
Greg_Deckler
Community Champion
7 years ago

You can expand out your rows in Power Query using something like:

 

    #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each List.Dates( [Initial Date], Number.From( [Final Date]- [Initial Date]) +1, #duration(1,0,0,0))),
    #"Expanded Custom" = Table.ExpandListColumn(#"Added Custom", "Custom")

 

 

There is also GENERATESERIES in DAX. But, depending on what you want to do, check out these two Quick Measures as I think you want something like them.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Open-Tickets/m-p/409364
https://community.powerbi.com/t5/Quick-Measures-Gallery/Periodic-Billing/m-p/409365

  • AlB's avatar
    AlB
    Community Champion
    7 years ago

    Hi esilva32

     

    It certainly looks like it would be easier to do this in the query editor. If you do need to do it in DAX, try this. Create a new calculated table:

     

    TableB = 
VAR _BaseTable =
    ADDCOLUMNS (
        GENERATE (
            DISTINCT ( TableA[Id] );
            GENERATESERIES (
                CALCULATE ( DISTINCT ( TableA[StartDate] ) );
                CALCULATE ( DISTINCT ( TableA[EndDate] ) )
            )
        );
        "TempVal"; CALCULATE ( DISTINCT ( TableA[Value] ) )
    )
VAR _Dates =
    DISTINCT ( SELECTCOLUMNS ( _BaseTable; "Date"; [Value] ) )
VAR _ResTable =
    ADDCOLUMNS (
        _Dates;
        "Total Value"; SUMX ( _BaseTable; IF ( [Value] = [Date]; [TempVal] ) )
    )
RETURN
    _ResTable

     

     

     

    • esilva32's avatar
      esilva32
      Frequent Visitor
      7 years ago

      Hello guys

      Thank you for your help. @AIB I tried your code and the message was this: it is not possible to convert multiple columns to a scalar value.

      Guys, in Power Query I have to build a new table to put this code in it?

      • AlB's avatar
        AlB
        Community Champion
        7 years ago

        esilva32

         

        It works fine on my end. Check it out in this file. Maybe you've done something differently.

         

        On a different note, please always show your sample data in text-tabular format in addition to (or instead of) the screen captures. That allows people trying to help to readily copy the data and run a quick test, plus it increases the likelihood of your question being answered. Just use 'Copy table' in Power BI and paste it here. Or, ideally, share the pbix (beware of confidential data).