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SHDJason's avatar
SHDJason
Icon for Advocate II rankAdvocate II
10 years ago
Solved

parallelperiod vs previousmonth vs adddate

Hi All,   I found a solution to this already but am confused about why it is so.     I need to find a simple previous month lookup.     Prev. Month Sales = CALCULATE(SUM([Total Sales]),DATEADD(...
  • v-sihou-msft's avatar
    v-sihou-msft
    10 years ago

    Hi SHDJason,

     

    In DAX, PARALLELPERIOD always returns full periods at the given granularity level instead of the partial periods that DATEADD returns. So please check if the dates in date column are continuous. If the dates in the current context do not form a contiguous interval, the function returns an error.

     

    Reference:
    PARALLELPERIOD Function (DAX)

     

    Regards,

SamiTi's avatar
SamiTi
Frequent Visitor
8 years ago

Hi, The solution is that you need to select 1 month in order for measure to return Previous month value. 

 

Hope this helps,

Sam

Anonymous's avatar
Anonymous
Not applicable
8 years ago

Hi,

 

I have the same problem. I try to show sales by customers but PREVIOUSMONTH function gives me a blank column.

 

The PARALLELPERIOD function gives me a sum of the sales for last month AND last year last month. (August 2017 + August 2018).

 

The DATEADD function gives me the same result as the PARALLELPERIOD function.

 

These results are obviously not what I expect.

 

(Yes I do have a date table with a relationship between my date table and my sales table.)

 

Could someone help ?

 

Thank you

 

 

  • SamiTi's avatar
    SamiTi
    Frequent Visitor
    7 years ago

    Hi,

     

    Test on new page.

     

    Create and Select from dropdown. August 2018

     

    Create Table chart:

    -Customer 

    -Sales measure.

    -Sales Previous Month measure = July 2018.

     

    Let me know if this helps

     

    Thanks

    Sam

    • Anonymous's avatar
      Anonymous
      Not applicable
      7 years ago

      Hi SamiTi,

       

      Thanks for replying. I don't really understand what you suggest me to try though, sorry.

      Here's a screenshot of what my report looks like until now.

       

      I don't want to have to apply a filter myself because my intention is to publish this report in the Power BI service and other users will daily consult it. So it has to calculate last month sales itself without my intervention.

       

      Thanks again

      Ben

      • SamiTi's avatar
        SamiTi
        Frequent Visitor
        7 years ago

        Hi Ben

         

        Add a slicer with  month year in order for measure to return Previous month value. 

         

        User will need to select Month from Slicer.