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Anonymous's avatar
Anonymous
Not applicable
8 years ago
Solved

Rolling DateDiff to compare dates within a Table

Hi,

 

I need to calculate date diff within a table to the prior row,

 

Here's a sample dataset:

CustomerID;OrderID;OrderDate;DaysBetweenOrders

123;12;'2009-04-01';0

123;12;'2009-04-23';22

123;12;'2009-05-14';21

123;43;'2009-05-13';0

123;43;'2009-05-29';16

432;54;'2009-06-01';0

432;54;'2009-06-04';3

432;54;'2009-06-04';0

555;65;'2009-06-22';0

555;67;'2009-06-30';0

653;89;'2009-07-04';0

 

Please help me here to how can we achieve this in Power BI.

 

Thanks,

Ganesh

Need Help
  • Stachu's avatar
    Stachu
    8 years ago

    this code below almost works - the issue is it gives 3 for both rows dated 2009-06-04
    in order to solve this you would need to either
    1) add row id as a column and use that as criteria instead of date
    2) have time of the order as well as the date, so you could specify that orders did not happen in the same moment

    Column =
VAR CurrentCustomerID = 'Table'[CustomerID]
VAR CurrentOrderID = 'Table'[OrderID]
VAR CurrentDate = 'Table'[OrderDate]
VAR PreviousDate =
    CALCULATE (
        LASTDATE ( 'Table'[OrderDate] ),
        FILTER (
            ALL ( 'Table' ),
            'Table'[CustomerID] = CurrentCustomerID
                && 'Table'[OrderID] = CurrentOrderID
                && 'Table'[OrderDate] < CurrentDate
        )
    )
RETURN
    IF ( PreviousDate = 0, 0, CurrentDate - PreviousDate )

1 Reply

  • Stachu's avatar
    Stachu
    Community Champion
    8 years ago

    this code below almost works - the issue is it gives 3 for both rows dated 2009-06-04
    in order to solve this you would need to either
    1) add row id as a column and use that as criteria instead of date
    2) have time of the order as well as the date, so you could specify that orders did not happen in the same moment

    Column =
VAR CurrentCustomerID = 'Table'[CustomerID]
VAR CurrentOrderID = 'Table'[OrderID]
VAR CurrentDate = 'Table'[OrderDate]
VAR PreviousDate =
    CALCULATE (
        LASTDATE ( 'Table'[OrderDate] ),
        FILTER (
            ALL ( 'Table' ),
            'Table'[CustomerID] = CurrentCustomerID
                && 'Table'[OrderID] = CurrentOrderID
                && 'Table'[OrderDate] < CurrentDate
        )
    )
RETURN
    IF ( PreviousDate = 0, 0, CurrentDate - PreviousDate )