question about using PreviousDay function

LeeI — Wed, 17 Jul 2024 10:45:38 GMT

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.

https://learn.microsoft.com/en-us/dax/previousday-function-dax

Would anyone be able to help me understand why the first dax expression does not seem to be working properly?

Thanks,

Re: question about using PreviousDay function

bhanu_gautam — Wed, 17 Jul 2024 11:28:20 GMT

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]))
)

topic Re: question about using PreviousDay function in DAX Commands and Tips

question about using PreviousDay function

Re: question about using PreviousDay function