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LeeI
Frequent Visitor

question about using PreviousDay function

I have a simple measure that is supposed to return the previous days number for a count of apps that meet a certain criteria. At first, I tried this dax expression: 

 

Apps previous day = Calculate(

                                                  count(data[app Number]), Previousday(date DIM [Date]))

 

This expression does not return an error, but it also does not return any values. I was able to get the measure to work properly by using:

 

Apps Previous Day =
CALCULATE(
    COUNT(Data[app Number]),
    FILTER(
        ALL('Date DIM'),
        'Date DIM'[Date] = Today() -1
    )
       
)
 
However, I am confused why the first dax expression does not work. Especially since Microsoft's publishing of the previousday function seems to imply that it should. 
 
 
Would anyone be able to help me understand why the first dax expression does not seem to be working properly? 
 
Thanks, 

 

 

1 ACCEPTED SOLUTION
bhanu_gautam
Super User
Super User

@LeeI  , The PREVIOUSDAY function is a time intelligence function that works with a date column to return a table containing the previous day. However, it requires a proper date context to function correctly.

 

Try using ALL function to remove any existing filter on dim[date]

 

Apps previous day =
CALCULATE(
COUNT(data[app Number]),
PREVIOUSDAY(ALL('Date DIM'[Date]))
)

 




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1 REPLY 1
bhanu_gautam
Super User
Super User

@LeeI  , The PREVIOUSDAY function is a time intelligence function that works with a date column to return a table containing the previous day. However, it requires a proper date context to function correctly.

 

Try using ALL function to remove any existing filter on dim[date]

 

Apps previous day =
CALCULATE(
COUNT(data[app Number]),
PREVIOUSDAY(ALL('Date DIM'[Date]))
)

 




Did I answer your question? Mark my post as a solution! And Kudos are appreciated

Proud to be a Super User!




LinkedIn






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