Forum Discussion
DAX previous month value
Hi All,
I have a scenario where i am supposed to get the previous month measure of the top scorer in the current month.
For example. my data look like below
| name | Date | Score | measure value |
| Alice | 01-02-2017 | 78 | 8 |
| Sam | 01-02-2017 | 67 | 9 |
| Sam | 01-03-2017 | 89 | 6 |
| Alice | 01-03-2017 | 56 | 7 |
Current month highest scorer is SAM and its measure value is 6.
So right now i am looking for SAM's previous month measure value which is 9.
Can anyone please help me with this scenario?
My suggestion:
Previous month score for top scorer =
VAR TopScorers = TOPN( 1, VALUES( Scores[name] ), CALCULATE(AVERAGE(Scores[Score])) ) VAR PrevMonth = CALCULATETABLE( DATEADD(Scores[Date],-1, MONTH), LASTDATE( Scores[Date]) ) RETURN CALCULATE( AVERAGE(Scores[Score]) , TopScorers , PrevMonth )Note the TOPN function wil return several players if you have ties in your current selection. Hence the average calculation.
Also, in case several months/dates are selected, I take the last one and calculate the previous month for this date.
4 Replies
Say you are looking at the data for march and have a filter on name = "Alice", should the measure still return Sam's score for february?
If there is a filter ="Alice" then it should return the measure value of "Alice" for the month of Feb.
If no filter is present then it should give the Highest scorer's previous month value, in this case it will be "Sam's" Feb value.
My suggestion:
Previous month score for top scorer =
VAR TopScorers = TOPN( 1, VALUES( Scores[name] ), CALCULATE(AVERAGE(Scores[Score])) ) VAR PrevMonth = CALCULATETABLE( DATEADD(Scores[Date],-1, MONTH), LASTDATE( Scores[Date]) ) RETURN CALCULATE( AVERAGE(Scores[Score]) , TopScorers , PrevMonth )Note the TOPN function wil return several players if you have ties in your current selection. Hence the average calculation.
Also, in case several months/dates are selected, I take the last one and calculate the previous month for this date.
