Forum Discussion

RNZALR's avatar
RNZALR
Helper I
3 years ago

Calculating Prior Year Values

I've got some player data for a sport and I've calculated the number of players who are either new, returning or retained.  The definitions of each type is:

  • New:  Does not appear in the database in any previous season
  • Retained:  Played last season
  • Returning:  Did not play last season but has played in the past and has now registered to play in the current season

My measures to calcuate each are working fine, however I am struggling to calculate the prior year metrics.  Here is the table I have:

I want the prior year numbers to appear on the table as well but I am struggling with the dax to make that happen.  For example, in the 2023 season, I want the Prior Year New Player Number to show 2,933 and the Prior Returning Player number to show 1,460.

 

How would I amend my dax formula to make that work?  Here are the formulas for the current years:

 

New Player Numbers =
VAR _currentyear =
    MAX ( 'Date Table'[Season] )
VAR _registerlist =
    SUMMARIZE ( 'Player Registrations', 'Player Master'[Person ID] )
VAR _previousregisterlist =
    CALCULATETABLE (
        SUMMARIZE ( 'Player Registrations', 'Player Registrations'[Person ID] ),
        'Date Table'[Season]< _currentyear
    )
RETURN
    COUNTROWS ( EXCEPT ( _registerlist, _previousregisterlist ) )
 
and
 
Retained Player Numbers =
VAR _currentyear =
    MAX ( 'Date Table'[Season] )
VAR _registerlist =
    SUMMARIZE ( 'Player Registrations', 'Player Master'[Person ID] )
VAR _prioryeargisterlist =
    CALCULATETABLE (
        SUMMARIZE ( 'Player Registrations', 'Player Master'[Person ID] ),
        'Date Table'[Season] = _currentyear - 1
    )
RETURN
    COUNTROWS ( INTERSECT ( _registerlist, _prioryeargisterlist ) )

 

Jihwan_Kim you were really helpful the last time on this one.  Any thoughts on this?

6 Replies

  • Jihwan_Kim's avatar
    Jihwan_Kim
    Super User
    3 years ago

    Hi,

    I tried to create a DAX formula based on what I got from the question.
    Please check if it suits your datamodel.

    Prior year New Player Numbers =
VAR _currentyear =
    MAX ( 'Date Table'[Season] )
VAR _prioryear = _currentyear - 1
VAR _prioryearregisterlist =
    CALCULATETABLE (
        SUMMARIZE ( 'Player Registrations', 'Player Registrations'[Person ID] ),
        'Date Table'[Season] = _prioryear
    )
VAR _previousofprioryearregisterlist =
    CALCULATETABLE (
        SUMMARIZE ( 'Player Registrations', 'Player Registrations'[Person ID] ),
        'Date Table'[Season] < _prioryear
    )
RETURN
    COUNTROWS (
        EXCEPT ( _prioryearregisterlist, _previousofprioryearregisterlist )
    )

     

     

    • RNZALR's avatar
      RNZALR
      Helper I
      3 years ago

      It is close, and certainly better than my attempts, but the numbers are not lining up.  See the table below

      What would the Prior Year Returning Player formula look like as well?

      • Jihwan_Kim's avatar
        Jihwan_Kim
        Super User
        3 years ago

        Hi,

        Thank you for your message.

        Please provide a link of the sample pbix file, and then I can try to look into it to come up with a more accurate solution.

        Thanks.