How to calculate with only data from the last year

[DLU]

Dear community, 

I'm currently struggling with the following problem. I've got a salestable with amounts and invoicedates. I've also got another table that always contains one date which I transferred into a date table. Now I want to calculate the total amount but only for the period of a year previous to the date in the date table. I tried it as follows: 

Total cost revenue LTM = CALCULATE(SUMX(CUSTINVOICETRANS;[Total costprice revenue]);DATESINPERIOD('Date'[Date];MAX('Date'[Date]);-1;YEAR))

But I got zero output. Could anyone assist? Many thanks in advance!

Gr. Diana

[Greg_Deckler · Accepted solution]

@DLU Maybe:

Measure = 
  VAR __Date = MAX('Dates'[Date])
  VAR __StartDate = DATE(YEAR(__Date)-1,MONTH(__Date),DAY(__Date))
  VAR __Table = FILTER('CUSTINVOICETRANS',[InvoiceDate]>=__StartDate && <=__Date)
RETURN
  SUMX(__Table,[Total costprice revenue])

You may find this helpful - https://community.powerbi.com/t5/Community-Blog/To-bleep-With-Time-Intelligence/ba-p/1260000

Also, see if my Time Intelligence the Hard Way provides a different way of accomplishing what you are going for.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Time-Intelligence-quot-The-Hard-Way-quot-TIT...

[DLU]

Dear Greg, 

Thank you for you response. I had to adjust it a little bit but that was probably due to the fact that by datetable is a little bit strange because it only contains one value, but the output is now correct! 

Total cost revenue LTM =

VAR _Date = MAX('Date'[Date])

VAR _Startdate = DATE(YEAR(_Date)-1;MONTH(_Date);DAY(_Date))

VAR _Table = FILTER(CUSTINVOICETRANS;CUSTINVOICETRANS[INVOICEDATE]>=_Startdate)

Return

SUMX(_Table;[Total costprice revenue])

With kind regards, 

Diana