添加上月列 DAX Power BI

Question

I have a fact table which has 'Last Data Update' column that shows current month date(mm/dd/yyyy), 06/13/2022.

I am trying to add column called 'report month' that returns a value that shows previous month/year 05/2022 to create relationship with calendar table.

=Date.Month([Last Data Update])-1

I have used this code, but this only returns 5 and it is in number format.

is there a way to return 05/2022 in DAX ?

Thanks in advance.

Answer 1

This is M, not DAX. Replace your custom column with the following code:

Text.PadStart( Text.From(Date.Month([Last Data Update])-1),2,"0") &"/"& Text.From(Date.Year([Last Data Update]))

Answer 2

It worked for we with this 3 simple steps:

Step 1: Create a column with current year (True/False statement) by using:

CurrentYear = IF(YEAR([Last Data Update])=YEAR(NOW()),1,0)

Step 2: Create a column that will indicate if the current date (based on column "Last Data Update" ) belongs to previous month or not (True/False statement).

PreviousMonth = IF([CurrentYear]=1 && (MONTH(TODAY())-1)=MONTH([Last Data Update]),1,0)

Step 3: Create a filter on your visual where you select filter "PreviousMonth" with value "1" to show dates only from previous month).

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Answer 3

This month-year

FORMAT( [Last Data Update], "mm/yyyy")

previous month

FORMAT( DATEADD([Last Data Update],-1,Month), "mm/yyyy")