Index column

hi evadung ,

Create a blank query and copy paste the following code into the advanced editor:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("hZFRDoAgDEPvwreSUTL9Vo9hvP81dDVBBiR++LM+226cZ9jCFNLzQZBnSXPKNlijzSRc04BYXoJgIVARYpI6g1zLZgD+PwbYAREuwAFaHDAEIAQWjg3Y2yXUVdybDShnJ3f534WOxlzMqj5hCyQh8C3YAVocUIDuxIjqIn4qOpmPyICnwXUD", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [item = _t, #"Cost component" = _t, Date = _t, Price = _t, Index = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"item", type text}, {"Cost component", Int64.Type}, {"Date", type date}, {"Price", type number}, {"Index", Int64.Type}}),
    #"Removed Columns" = Table.RemoveColumns(#"Changed Type",{"Index"}),
    #"Sorted Rows" = Table.Sort(#"Removed Columns",{{"Date", Order.Ascending}}),
    #"Grouped Rows" = Table.Group(#"Sorted Rows", {"item", "Cost component"}, {{"Details", each _, type table [item=nullable text, Cost component=nullable number, Date=nullable date, Price=nullable number]}}),
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each Table.AddIndexColumn([Details],"Index",0,1)),
    #"Removed Columns1" = Table.RemoveColumns(#"Added Custom",{"item", "Cost component", "Details"}),
    #"Expanded Custom" = Table.ExpandTableColumn(#"Removed Columns1", "Custom", {"item", "Cost component", "Date", "Price", "Index"}, {"item", "Cost component", "Date", "Price", "Index"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Expanded Custom",{{"item", type text}, {"Cost component", Int64.Type}, {"Date", type date}, {"Price", type number}, {"Index", Int64.Type}}),
    #"Sorted Rows1" = Table.Sort(#"Changed Type1",{{"Date", Order.Ascending}})
in
    #"Sorted Rows1"