Dynamic Previous Month Column

[Sher]

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?

[v-janeyg-msft · Accepted solution]

Hi, @Sher 

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.

[mahoneypat]

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

[Sher]

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