Forum Discussion

Anonymous's avatar
Anonymous
Not applicable
5 years ago
Solved

Dynamic Previous Month Column

Hi,

 

I have included a picture of the table below that I'm working with. Essentialy what I want is a Column that says "TRUE" when it is the previous month dynamically and "FALSE" when it isnt. I can do this through Power Query M, but. for my specific case when the month is January as it is now I want the previous month to be "TRUE" for December. Ignore the date column itself as that doesnt actually matter in this case.Would anyone know how to achieve this dynmaically through DAX?

 

Need Help
  • v-janeyg-msft's avatar
    v-janeyg-msft
    5 years ago

    Hi, Anonymous 

     

    According to your description,I think you can create a measure or column to calculate the desired result.

    Like this:

    Column = var month1=MONTH(EDATE(TODAY(),-1))
var month2=MONTH('Table'[date])
return IF(month1=month2,"True","False")
    Measure = var month1=MONTH(EDATE(TODAY(),-1))
var month2=MONTH(SELECTEDVALUE('Table'[date]))
return IF(month1=month2,"True","False")

    If it doesn’t solve your problem, please feel free to ask me.

     

    Best Regards

    Janey Guo

     

    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

3 Replies

  • mahoneypat's avatar
    mahoneypat
    Microsoft Employee
    5 years ago

    Here is one way to do it.

     

    Prev Month = DATEDIFF ( TODAY (), [Date], MONTH ) = -1
     
    Another thing to consider is leaving the "= -1" off and have a column that shows the relative month.  You can filter on =-1 in your measures/visuals, but then you also have the option to make charts/tables using the relative month column.
     
    Regards,
    Pat
    • Anonymous's avatar
      Anonymous
      Not applicable
      5 years ago

      HI Pat,

       

      Ive tried this and unfortunately it didnt work, it kept coming up with "BLANK" when i included the =-1 and when i excluded it wasnt of much use unfortunately. have any other ideas or able to help?

       

      Thanks 

  • v-janeyg-msft's avatar
    v-janeyg-msft
    Community Support
    5 years ago

    Hi, Anonymous 

     

    According to your description,I think you can create a measure or column to calculate the desired result.

    Like this:

    Column = var month1=MONTH(EDATE(TODAY(),-1))
var month2=MONTH('Table'[date])
return IF(month1=month2,"True","False")
    Measure = var month1=MONTH(EDATE(TODAY(),-1))
var month2=MONTH(SELECTEDVALUE('Table'[date]))
return IF(month1=month2,"True","False")

    If it doesn’t solve your problem, please feel free to ask me.

     

    Best Regards

    Janey Guo

     

    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.