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RyanL-EIS's avatar
RyanL-EIS
Frequent Visitor
9 years ago

Latest Record in Group via Query Editor

We are trying to get the latest record/row in a group via Query Editor.  After we expand the group and we filter on the latest record, it filters the entire dataset and not within the group.  Please ...
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MarcelBeug's avatar
MarcelBeug
Community Champion
9 years ago

The way to go is to adjust the generated code for #"Grouped Rows", more specifically the part each _

Here you can specify the selection.

 

This should work, but I can't test of course:

 

#"Grouped Rows" = Table.Group(#"Removed Duplicates", {"settleID", "productionDate"}, {{"SettleID-Statement_Group", each Table.SelectRows(_, let latest = List.Max(_[#"SettleID-Statement_Group.statementDate"]) in each [#"SettleID-Statement_Group.statementDate"] = latest), type table}}),

 

 

  • RyanL-EIS's avatar
    RyanL-EIS
    Frequent Visitor
    9 years ago

    Hi Marcel,

     

    Thanks for your help and we believe we are close.  The logic behind your code makes sense for what we are trying to accomplish; however, we are getting the following error trying to preview/expand the subtable of the grouped rows.

     

    Expression.Error: The field 'SettleID-Statement_Group.statementDate' of the record wasn't found.

    Any idea?

    • RyanL-EIS's avatar
      RyanL-EIS
      Frequent Visitor
      9 years ago

      Also, should we be trying to select/filter on grouped rows at the query level (Query Editor) OR it is better to create a calculated table instead?  If so, any suggestions on the DAX for the calculated table?

      • MarcelBeug's avatar
        MarcelBeug
        Community Champion
        9 years ago

        Ah, I copied the code from your last line of code, but fields were renamed, so you shouldn't use 'SettleID-Statement_Group.statementDate', but just statementDate in the code I supplied.

         

        The question about DAX or Power Query: my specialty is Power Query and I know little about DAX, so I'm pretty biased, but I think it's safe to state that you should use:

        Power Query if you don't need to have the detailed data (before grouping) in your data model, while
        DAX might be the better option if you need both the detailed and grouped information, as this will take into account any filter context.

         

        As I know little about DAX, others will be better able to help you with any DAX solution.

         

         

  • vgeldbr's avatar
    vgeldbr
    Helper IV
    4 years ago

    This formula solved my problem for me (thanks!). I'm using it in a dataflow. However, it performs extremely slowly. Is that expected?

     

    I'm doing a Table.Group on a linked table (based on some ingested and transformed Excel files) that is 1,996,452 rows and 19 columns. Unfortuntely the columns are all text type except for a date column and I'm using the technique described her to get the latest dated row from the grouping. I then need to expand the table to get the columns from that row.  MarcelBeug