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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,

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

Sean

 

Yes i do have a calendar table. I tried using that and the date column in the data table. Both worked, but only for parallelperiod.  

 

Is it possible that PowerBI caches the data and then does not always refresh? Sometimes, if I create a formula incorrectly then correct it, the new calculated values do not load. But if I refresh the dataset, they do load. I'm wondering if it is a cache issue. 

Sean's avatar
Sean
Icon for Community Champion rankCommunity Champion
10 years ago

SHDJason

This is what I get with the Measures - numbered in the order you listed them (top to bottom)

 

If you don't have a Month field though they'll either total OR

as is the case with the 2nd Measure it will be blank because it doesn't have any reference month

 

 

If you change a Measure it should immediately reflect that change - but that doesn't trigger data refresh.