Numbering (conditional) duplicates without supporting column

[navafolk]

Hi pros,

I tried to create a column to number (multi conditions) duplicates

The Numbering Duplicates should be looked like this:

Tran Name	Date	[expect] Numbering Duplicates
VCCB	01 Jan 2020	1
VCCB	01 Jan 2020	2
VCBF	02 Jan 2020	1
VCCB	03 Jan 2020	1
TCBF	03 Jan 2020	1
TCBF	03 Jan 2020	2
TCBF	03 Jan 2020	3

This thing is easilly done in excel =COUNTIFS($A$1:A2,A2,$B$1:B2,B2) (assumed data started in A1)

Please help to do this without supporting column(s), thank you.

[v-alq-msft · Accepted solution]

Hi, @navafolk 

Dax will identify the duplicates as the same row. It is unavailable to reach your requirement without creating an index column. I'd like to suggest you create an index column.

You may click 'Edit Query', go to Query Editor, click 'Add Columns' ribbon, 'Index column'.

You may create a measure as follows.

Numbering Duplicates = 
var _index = MAX('Table'[Index])
var _name = MAX('Table'[Tran Name])
var _date = MAX('Table'[Date])
return
IF(
    ISFILTERED('Table'[Tran Name]),
    COUNTROWS(
        FILTER(
            ALL('Table'),
            'Table'[Index]<=_index&&
            'Table'[Tran Name] = _name&&
            'Table'[Date] = _date
        )
    )
)

Result:

Best Regards

Allan

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