Parallelperiod not working as expected

[Anonymous]

Hello, 

With Covid 19 , I am trying to compare monthly "numbers" with the ones from last year but also from the same period in 2019 ...

My table is only 2 columns : date & number1 

I am adding a column number2 

 = CALCULATE(SUM(MyTable[number1]), PARALLELPERIOD(MyTable[Date],( ( 2019 - year(MyTable[Date]) ) * 12) ,MONTH) )

but il only returns data for 2019 !!! Any idea of my mistake ?

[Anonymous · Accepted solution]

Hi  @Anonymous ,

Here are the steps you can follow：

1. Create calculated column.

number2 =
var _current='Table'[number1]
var _last=CALCULATE(SUM('Table'[number1]),FILTER(ALL('Table'),'Table'[Date]=DATE( YEAR(EARLIER('Table'[Date]))-1,MONTH(EARLIER('Table'[Date])),DAY(EARLIER('Table'[Date])))))
return
_current-_last

2. Result:

If I have misunderstood your meaning, please provide your desired output and your pbix file without privacy information.

Best Regards,

Liu Yang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[Samarth_18]

Hi @Anonymous ,

Try to use calender date table in PARALLELPERIOD.

Thanks,

Samarth

[Anonymous]

Hello, you mean the calendar date that I use as "date" reference in my Power BI ? 

Calendrier =

ADDCOLUMNS(

CALENDAR(DATE(2019,01,01), TODAY()),

"Année" , year([Date]),

"Année Trimestre", Year([Date]) & "-Q" & Format([Date], "q"),

"Année Mois" , FORMAT([date],"YYYY MM"),

"Num Mois", FORMAT ( [Date], "MM" ),

"Mois", FORMAT([date],"MMMM"),

"Semaine", WEEKNUM([Date]),

"Trimestre", "Q" & FORMAT ( [Date], "Q" ),

"YearMonthShort", FORMAT ( [Date], "YYYY/mmm" ),

"MonthNameShort", FORMAT ( [Date], "mmm" ),

"DayOfWeekNumber", WEEKDAY ( [Date] ),

"DayOfWeek", FORMAT ( [Date], "dddd" ),

"DayOfWeekShort", FORMAT ( [Date], "ddd" )

)

[Anonymous]

they are linked 

same issue with 

number2   = CALCULATE(SUM(MyTable[number1]), PARALLELPERIOD('Calendrier'[Date],( ( 2019 - year(MyTable[Date]) ) * 12) ,MONTH) )

[Samarth_18]

@Anonymous Yes try to use it.

[Anonymous]

number2   = CALCULATE(SUM(MyTable[number1]), PARALLELPERIOD('Calendrier'[Date],( ( 2019 - year(MyTable[Date]) ) * 12) ,MONTH) ) is giving the same result ... only resylts for 2019 dates !!! 

and when I try 

number2   = CALCULATE(SUM(MyTable[number1]), PARALLELPERIOD('Calendrier'[Date],( ( 2019 - year('Calendrier'[Date]) ) * 12) ,MONTH) ) ... I have power bi error saying too many values in Calendrier ... 

[Samarth_18]

@Anonymous Do you want to calculate 2019 and previous year on the same column?