Index with repeated values

Hi Incamus ,

Please refer the steps below.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUUpMVIrViVYyQjCNEUwTIDMpCc5MTgYzTYHMlBQw0wzITE2FM9PS4MyMDKXYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Nº Cte" = _t, #"Contagem de Tranportadoras.Nome" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Nº Cte", Int64.Type}, {"Contagem de Tranportadoras.Nome", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Nº Cte"}, {{"Data", each Table.AddIndexColumn(_, "Index", 0, 1, Int64.Type)}}),
    #"Expanded Data" = Table.ExpandTableColumn(#"Grouped Rows", "Data", {"Contagem de Tranportadoras.Nome", "Index"}, {"Contagem de Tranportadoras.Nome", "Index"})
in
    #"Expanded Data"

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly. If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

How to get your questions answered quickly --  How to provide sample data in the Power BI Forum