check if value exist in previous file and not in present file

[kb177]

Hi,

 I want to check if any value was present in previous month file and not in present file

can there be a measure or dax to compare present month file and previous month file

as in the below example ID 456 was present in april and may and in June it should show Not found

Expected result

month   ID

April'23 456

May'23 456

June '23 Not found

[Anonymous]

Hi @kb177 ,

Please have a try.

 Create a calculated column.

MonthYear = FORMAT([Date], "MMM'YY")

`Then create 2 measures.

CurrentMonthCount = DISTINCTCOUNT('Table'[ID])

PreviousMonthCount = CALCULATE(DISTINCTCOUNT('Table'[ID]), DATEADD('Table'[Date], -1, MONTH))

Finally, create a measure that checks if any IDs were present in the previous month but not in the current month.

NotFound = IF(PreviousMonthCount - CurrentMonthCount > 0, "Not found", BLANK())

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