Solved: Re: Calculated Table

mwild · ‎01-05-2022

Hi,

I have a table in Excel (to be imported into Power Bi) which has dates down one side (running from January 2010 to way into the future)
My columns are vehicles A, B and C (but over 100 of them) and the date within the spreadsheet is cumulative miles

I'm looking at creating a new table which will show me the daily miles instead so A would show 232 which is the difference between 15th and 16th

Does anyone know of a way to do this please?

PaulDBrown · ‎01-05-2022

Firstly I would recommend you Unpivot the Vehicle columns.

You can then create a calculated column to get the daily mileage for each vehicle using:

Daily Mileage =
VAR PrevDate =
    CALCULATE (
        SUM ( 'DataTable'[Mileage] ),
        FILTER (
            'DataTable',
            'DataTable'[Vehicle] = EARLIER ( 'DataTable'[Vehicle] )
                && 'DataTable'[Date]
                    = EARLIER ( 'DataTable'[Date] ) - 1
        )
    )
VAR CurrDate =
    CALCULATE (
        SUM ( 'DataTable'[Mileage] ),
        FILTER (
            'DataTable',
            'DataTable'[Vehicle] = EARLIER ( 'DataTable'[Vehicle] )
                && 'DataTable'[Date] = EARLIER ( 'DataTable'[Date] )
        )
    )
RETURN
    CurrDate - PrevDate

To get:

If you want the "Daily Mileage" for the first (minimum) date to be blank, use:

Daily Mileage =
VAR MinDate =
    MIN ( 'DataTable'[Date] )
VAR PrevDate =
    CALCULATE (
        SUM ( 'DataTable'[Mileage] ),
        FILTER (
            'DataTable',
            'DataTable'[Vehicle] = EARLIER ( 'DataTable'[Vehicle] )
                && 'DataTable'[Date]
                    = EARLIER ( 'DataTable'[Date] ) - 1
        )
    )
VAR CurrDate =
    CALCULATE (
        SUM ( 'DataTable'[Mileage] ),
        FILTER (
            'DataTable',
            'DataTable'[Vehicle] = EARLIER ( 'DataTable'[Vehicle] )
                && 'DataTable'[Date] = EARLIER ( 'DataTable'[Date] )
        )
    )
RETURN
    IF ( 'DataTable'[Date] = MinDate, BLANK (), CurrDate - PrevDate )

I've attached the sample PBIX file

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mwild · ‎01-06-2022

does exactly as I needed - thanks for this 👍