Forum Discussion

lbrown's avatar
lbrown
Helper I
7 years ago
Solved

Dax or Power Query (M) Formula for duplicate values in the same column

If anyone could help me write a dax or power query formula for the two steps below I would greatly appreciate your knowledge.

 

1. If Column A has a duplicate value, and the value in Column B is the same, then return the record with the most recent date.

 

2. If Column A has a duplicate value, and the value in Column B is NOT the same, then keep both records.

 

I'm trying to achieve one formula that can account for both requirements. I've attached images of sample data to better explain. 

  • Anonymous's avatar
    Anonymous
    7 years ago

    lbrown,

    Could you please explain that why you have duplicate values for first row? I make a test using the following sample table instead, and create a measure in the table.

    maxdate = MAX(Table[Date])




    Regards,
    Lydia

3 Replies

  • Anonymous's avatar
    Anonymous
    Not applicable

    lbrown,

    Could you please explain that why you have duplicate values for first row? I make a test using the following sample table instead, and create a measure in the table.

    maxdate = MAX(Table[Date])




    Regards,
    Lydia

    • lbrown's avatar
      lbrown
      Helper I
      Anonymous
      There are duplicates because an entry can be made on the spreadsheet on different days. I am needing to select the most recent date if Column B is the same. If Column B is different then I need to keep both rows.
       
      After creating the measure I am still seeing duplicates.
       
    • lbrown's avatar
      lbrown
      Helper I

      Anonymous

       

      I figured out the error. I was adding the table date column instead of maxdate. Your answer worked perfectly, thank you!