M Code - Custom Column Headache

Hello lgs1983 

you didn't describe the logic why Full Ind is 1 when in the column are also 0. I tried to reproduce your table and the logic is to group by Parent, and then add a new column to the grouped table, that is using the first item in the Ind-column other than 0.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcsxNrMrPUwj1VtKBsvWS83OBHAOlWB24dHB5akpqHroSQ2QlAYlFiemliZVYzIkFAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Child = _t, Parent = _t, #"Sweden Ind" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Child", type text}, {"Parent", type text}, {"Sweden Ind", Int64.Type}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Parent"}, {{"AllRows", each _, type table [Child=text, Parent=text, Sweden Ind=number]}}),
    FullID = Table.TransformColumns
    (
        #"Grouped Rows",
        {
            {
                "AllRows",
                (tbl)=> Table.AddColumn(tbl, "FullStructure", (add)=> try List.Select(tbl[Sweden Ind], each _ <> 0){0} otherwise null)
            }
        }
    ),
    #"Expanded AllRows" = Table.ExpandTableColumn(FullID, "AllRows", {"Child", "Sweden Ind", "FullStructure"}, {"Child", "Sweden Ind", "FullStructure"})
in
    #"Expanded AllRows"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

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Jimmy