How to calculate RowNumber of a row in DAX

Question

Hello,
I have a requirement to find the rowmumbers based on a group. I know there is Rownumber function in sql. How can I implement the same in DAX. PFA screenshot. Rownumber is the calculated field i want based on the id and name column group.

Answer 1

Your table looks like as if there has been a unique identifier before (Date, month i.e.) – why has this been lost? Can you get it back?
If that’s not possible and it still makes sense to operate on ID-row-level (instead of grouping at this stage), you can use Power Pivots ETL-sister: Power Query. So instead of taking your table directly into Power Pivot, you drag
it through PowerQuery and load it to the model.
The code would look like this: (Tabelle1 being the name of your table, this string could be adjusted to directly connect to your source)
let RowNumber_ = (ID) =>
let
Quelle = Excel.CurrentWorkbook(){[Name="Tabelle1"]}[Content],
AddIndex = Table.AddIndexColumn(Quelle, "Index", 0, 1),
FilterID = Table.SelectRows(AddIndex, each ([ID] = ID)),
AddRowNumberOnIdLevel = Table.AddIndexColumn(FilterID, "RowNumber", 1, 1)
in
AddRowNumberOnIdLevel,
Quelle = Excel.CurrentWorkbook(){[Name="Tabelle1"]}[Content],
AddIndex = Table.AddIndexColumn(Quelle, "Index", 0, 1),
GroupRows = Table.Group(AddIndex, {"Name"}, {{"ID", each List.Min([ID]), type number}}),
InvFunction = Table.AddColumn(GroupRows, "Custom", each RowNumber_([ID])),
ShowFields = Table.ExpandTableColumn(InvFunction, "Custom", {"Salary", "RowNumber"}, {"Salary", "RowNumber"})
in
ShowFields
Imke