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dkbollig Frequent Visitor
Frequent Visitor

Calculate difference from previous month

I have the following table that looks as such





















I am using the following formula to count all orders


numOrders = COUNTROWS(AllOrders)

I then calculate the total retailed orders based on whether there is a retail date

Total Retailed = CALCULATE (
      FILTER (
        AND (
            NOT ( ISBLANK ( 'AllOrders'[RetailDate] ) ),
            DATEVALUE(AllOrders[RetailDate]) <= MAX ( BasicCalendarUS[DateKey] )

I then calculate the total retailed orders year to date by using this formula

Total Retailed  YTD = CALCULATE (
    [Total Retailed],
    FILTER (
        YEAR( 'AllOrders'[RetailDate] ) = YEAR( MAX ( BasicCalendarUS[DateKey] ) )

Now what I want is to have it do a month over month calculation to see the difference. I am having trouble picking up a formula that looks to the previous month and subtracts it from the current month to give me the number. 


Below is a screenshot of what I am looking for. ( I left out some months for simplicity)




Any help would be greatly appreciated 




Community Support Team
Community Support Team

Re: Calculate difference from previous month

Hi @dkbollig,


In my opinion, you can use a calculate column to store the running total, then write a measure to get the running total of previous month and calculate the different between current value and previous.



Xiaoxin Sheng

Community Support Team _ Xiaoxin Sheng
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ElliotP Member

Re: Calculate difference from previous month

@v-shex-msftSounds like the idea. I can't see any operations in there so that might be something to consider.