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Larry130's avatar
Larry130
Frequent Visitor
9 years ago
Solved

Current month vs Previous month

Hi! Could you guys give some help? I'm struggling here.

I need to do a calculation between the current x last month, but I'll not use a date dimension to show each month in a table/graph. Because of that, the PrevMonth below is not working. What should I do to bring the last month data, so I can divide with the MTD and found the % between them?

ID Alert = COUNT('Alerts'[ID])
PrevMonth = CALCULATE([ID Alert],PARALLELPERIOD('Calendar'[Date],-1;MONTH))

Tks in advance.

Need Help
  • v-ljerr-msft's avatar
    v-ljerr-msft
    9 years ago

    Hi Larry130,

     

    If I understand you correctly, the formula below should work in your scenario. :smileyhappy:

    PrevMonth =
VAR currentMonth =
    MONTH ( TODAY () )
VAR currentYear =
    YEAR ( TODAY () )
RETURN
    IF (
        currentMonth = 1,
        CALCULATE (
            [ID Alert],
            FILTER (
                ALL ( 'Calendar'[Date] ),
                YEAR ( 'Calendar'[Date] )
                    = currentYear - 1
                    && MONTH ( 'Calendar'[Date] ) = 12
            )
        ),
        CALCULATE (
            [ID Alert],
            FILTER (
                ALL ( 'Calendar'[Date] ),
                YEAR ( 'Calendar'[Date] ) = currentYear
                    && MONTH ( 'Calendar'[Date] )
                        = currentMonth - 1
            )
        )
    )

     

    Regards

3 Replies

  • v-ljerr-msft's avatar
    v-ljerr-msft
    Icon for Microsoft Employee rankMicrosoft Employee
    9 years ago

    Hi Larry130,

     

    If I understand you correctly, the formula below should work in your scenario. :smileyhappy:

    PrevMonth =
VAR currentMonth =
    MONTH ( TODAY () )
VAR currentYear =
    YEAR ( TODAY () )
RETURN
    IF (
        currentMonth = 1,
        CALCULATE (
            [ID Alert],
            FILTER (
                ALL ( 'Calendar'[Date] ),
                YEAR ( 'Calendar'[Date] )
                    = currentYear - 1
                    && MONTH ( 'Calendar'[Date] ) = 12
            )
        ),
        CALCULATE (
            [ID Alert],
            FILTER (
                ALL ( 'Calendar'[Date] ),
                YEAR ( 'Calendar'[Date] ) = currentYear
                    && MONTH ( 'Calendar'[Date] )
                        = currentMonth - 1
            )
        )
    )

     

    Regards

    • Larry130's avatar
      Larry130
      Frequent Visitor
      9 years ago

      PERFECT! Thanks v-ljerr-msft

      I've tried to use the SQLBI DAX Pattern for previous month, but was really hard to understand. Your way of doing it using VAR was way easier to understand. I'll study VAR!

    • mnarmeen's avatar
      mnarmeen
      Icon for Advocate I rankAdvocate I
      9 years ago

      Dear v-ljerr-msft ,

       

      I have a similar problem but the following code shows blank. My scenario is to calculate max difference between two time duration (hours) which is already a calculated column (DiffDeliveryTime). Slight difference is that I don't want to use calendar table to filter out my values instead I want to use my own table in which dates are stored. The dates are repeating as many deliveries are scheduled on the same day as well.

       

      PrevMonth =
VAR currentMonth =
    MONTH ( invoice[DeliveryDate] )
VAR currentYear =
    YEAR ( invoice[DeliveryDate] )
RETURN
    IF (
        currentMonth = 1,
        CALCULATE (
            MAX(DiffDeliveryTime),
            FILTER (
                ALL ( invoice[DeliveryDate]),
                YEAR ( invoice[DeliveryDate] )
                    = currentYear - 1
                    && MONTH ( invoice[DeliveryDate] ) = 12
            )
        ),
        CALCULATE (
            MAX(DiffDeliveryTime),
            FILTER (
                ALL ( invoice[DeliveryDate] ),
                YEAR ( invoice[DeliveryDate] ) = currentYear
                    && MONTH ( invoice[DeliveryDate] )
                        = currentMonth - 1
            )
        )
    )