Cumulative to non cumulative

[AishwariyaV]

In this example table we have cumulative data for a specific cc no. and month number. Now I would want to find the actual revenue in power bi itself. For reference I have put the actual rev. value in the table 

[Mariusz · Accepted solution]

Hi @AishwariyaV 

Try the below.

Column = 
VAR _month = 'Table'[Month No]
VAR _previousRev =
    CALCULATE(
        MAX( 'Table'[cumulative rev.] ),
        ALLEXCEPT( 'Table', 'Table'[cc no.] ),
        'Table'[Month No] < _month
    ) 
RETURN 'Table'[cumulative rev.] - _previousRev

Best Regards,
Mariusz

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[Mariusz · Accepted solution]

Hi @AishwariyaV 

Try the below.

Column = 
VAR _month = 'Table'[Month No]
VAR _previousRev =
    CALCULATE(
        MAX( 'Table'[cumulative rev.] ),
        ALLEXCEPT( 'Table', 'Table'[cc no.] ),
        'Table'[Month No] < _month
    ) 
RETURN 'Table'[cumulative rev.] - _previousRev

Best Regards,
Mariusz

If this post helps, then please consider Accepting it as the solution.

Please feel free to connect with me.

[AishwariyaV]

Hey @Mariusz , 

  Thaks fror the reply.It has solved my problem but Iam not able to understand the logic behind the query. Can  you give a brief explanation of the logic so that I can extend it to my fairly big actual data set in a more informed manner.

[Mariusz · Accepted solution]

HI @AishwariyaV 

Sure.

Column = 
VAR _month = 'Table'[Month No] --varieble captures Month no in current row 
VAR _previousRev = -- varieble taht calculates previous revenue 
    CALCULATE(
        MAX( 'Table'[cumulative rev.] ), --3 Max Revenue amount for months lower then current month 
        ALLEXCEPT( 'Table', 'Table'[cc no.] ), --1 ALLEXCEPT removes filter context from 'Table' apart from one on Table'[cc no.]
        'Table'[Month No] < _month --2 filters table further to include months lower the one in the current row
    ) 
RETURN 'Table'[cumulative rev.] - _previousRev

Best Regards,
Mariusz

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[AishwariyaV]

Hey @Mariusz , 

     The DAX logic works just fine with my data-set but then I should Ideally do a lot of work at Edit Queries level like

un-pivoting,transposing etc. for that I should apply the same logic at the edit queries level. Can you help out with this prob. in a way ?

[Mariusz]

Hi @AishwariyaV 

Please see the attached file with three different solutions.

1. DAX column in "Table"
2. M ( Query Editor )  in "Table"
3. UI ( Query Editor )  in "Table A/B"

Best Regards,
Mariusz

If this post helps, then please consider Accepting it as the solution.

Please feel free to connect with me.

[amitchandak]

Check this. Find the most recent value and subtract it

https://community.powerbi.com/t5/DAX-Commands-and-Tips/Finding-the-most-recent-value/td-p/116838