Create a Column that increments when another column changes

[Anonymous]

How do I create a colum (B) that starts at "1" and increments when column A changes? 🙂

[Anonymous]

here  you can find some solutions(some of which are very similar to the one proposed here ) to identical problem

[Anonymous]

Thank you I appreciate the links.

[ImkeF · Accepted solution]

Hi @Anonymous ,

if you group on ColumnA/Week Number with GroupKind.Local and select "All Rows" in the aggregation, you'll get a table where you simply add an index column to. Then expand the grouped columns again:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjVUitVBUEZgyhCDNIKRsQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Week number1" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Week number1", Int64.Type}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Week number1"}, {{"All", each _, type table [Week number1=nullable number]}}, GroupKind.Local),
    #"Added Index" = Table.AddIndexColumn(#"Grouped Rows", "Group", 1, 1, Int64.Type),
    #"Removed Columns" = Table.RemoveColumns(#"Added Index",{"Week number1"}),
    #"Expanded All" = Table.ExpandTableColumn(#"Removed Columns", "All", {"Week number1"}, {"Week number"})
in
    #"Expanded All"

[Anonymous]

Thank you @ImkeF  I appreciate it