Column to indicate if same invoice has an earlier date

[paguy215]

I have a data set in which I have a series of invioces with various criteria.   But i'm trying to account for an issue in which multiple invoices are created for the same account.  This would only occur if another criteria is met, in this case a flag is indicated...so I can't use Group By in Power Query

Can I create  column in the table that would identify if that same accountID has another row with an earlier invoice date?

[Anonymous · Accepted solution]

Hi @paguy215 ,

I create a table as you mentioned.

Then I create a new calculated column.

Column =
VAR _minDate =
    CALCULATE (
        MIN ( 'Table'[Date] ),
        FILTER (
            ALLSELECTED ( 'Table' ),
            'Table'[accountID] = EARLIER ( 'Table'[accountID] )
        )
    )
VAR _maxDate =
    MAXX (
        FILTER (
            ALLSELECTED ( 'Table' ),
            'Table'[accountID] = EARLIER ( 'Table'[accountID] )
        ),
        'Table'[Date]
    )
RETURN
    IF ( 'Table'[Date] = _minDate && 'Table'[Date] <> _maxDate, 1 )

Finally you will get the date you want.

Best Regards

Yilong Zhou

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[lbendlin]

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