Forum Discussion

SHDJason's avatar
SHDJason
Advocate 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
Advocate 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. 

v-sihou-msft's avatar
v-sihou-msft
Microsoft Employee
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, 

     

    Above measure and functions are all working well as mentioned.

     

    However i cant see the Previousmonth sales BY category/store/product division all i get is "blank".

     

     

    screenshot Screenshot