Month Series

[esam]

Hi I have date table from 2023 to 2025 i want a column with month series where 36 being december 2025 and 1 being January 2023.

[smpa01]

@esam not sure what your Date table looks like, I simply Assumed that you have only 1 column table as Calendar[Date]

Column =
RANKX (
    'Calendar',
    DATE ( MONTH ( 'Calendar'[Date] ), YEAR ( 'Calendra'[Date] ), 1 ),
    ,
    ASC,
    DENSE
)

[FreemanZ]

hi @esam 

try to add a column like:

Month Series =

DATEDIFF([Date], DATE(2023, 1, 1), MONTH)+1

[esam]

Hi @FreemanZ 

The solution you provided gave something similar but not accurate it is giving me result in negative 

for jan 2023 it is one than feb 2023 0 and for december 2025 -33 

[FreemanZ · Accepted solution]

hi @esam 

t

Aha, try like

Month Series =

DATEDIFF(DATE(2023, 1, 1), [Date], MONTH)+1

[esam]

Thank you for the solution @FreemanZ can you explain a bit how this logic is working here !! 

also how to get better with dax with real world scenarios 

[FreemanZ]

hi @esam 

there is no secret, as long as you know the DATEDIFF function, which returns the number of periods between two dates. In this case, the period is MONTH. 

In general,  learning DAX by doing. Try to bring change and value to your daily work with DAX.  If time allows, come back to the community and try to contribute. 

[johnt75]

You could try a calculated column like

Month series =
VAR ReferenceDate = 'Date'[Date]
VAR PrevMonths =
    CALCULATETABLE (
        VALUES ( 'Date'[Year month] ),
        REMOVEFILTERS ( 'Date' ),
        'Date'[Date] < ReferenceDate
    )
RETURN
    COUNTROWS ( PrevMonths ) + 1

[esam]

Removefilter with comparison operator is not correct 

[johnt75]

I think maybe you've missed a close bracket, the REMOVEFILTERS and comparison are separate.

[esam]

 

the series generated by this 13,12,....1

[johnt75]

OK, the below works for me

Month series = 
VAR ReferenceDate = 'Date'[Date]
VAR PrevMonths =
    CALCULATETABLE (
        DISTINCT ( 'Date'[Year month] ),
        REMOVEFILTERS ( 'Date' ),
        'Date'[Date] <= ReferenceDate
    )
RETURN
    COUNTROWS ( PrevMonths )