Decomposition Tree Visual & Data Preparation

Hi Dadoge ,

Try grouping and then filling down:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("jc85DoAgEEDRq5ipKdiX2mMQCg/g0np7BWQcCYUJJCwv5BMjzPt6LNs5CWCAg99TSKWNzQtILObTRiU6QZ3snRo71Ryhum4ldZo4Qk15gjhTXLu2/T+cD9XZvs99+tC5QZ9/+9D5cV94+tCFn05wSOkC", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Level 1" = _t, #"Level 2" = _t, #"Level 3" = _t, #"Level 4" = _t, #"Hierachy Level" = _t, #"Contract Number" = _t, Index = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Level 1", type text}, {"Level 2", type text}, {"Level 3", type text}, {"Level 4", type text}, {"Hierachy Level", Int64.Type}, {"Contract Number", Int64.Type}, {"Index", Int64.Type}}),
    #"Unpivoted Columns" = Table.UnpivotOtherColumns(#"Changed Type", {"Hierachy Level", "Contract Number", "Index"}, "Attribute", "Value"),
    #"Replaced Value" = Table.ReplaceValue(#"Unpivoted Columns","",null,Replacer.ReplaceValue,{"Attribute", "Value"}),
    #"Pivoted Column" = Table.Pivot(#"Replaced Value", List.Distinct(#"Replaced Value"[Attribute]), "Attribute", "Value"),
    #"Sorted Rows" = Table.Sort(#"Pivoted Column",{{"Index", Order.Ascending}}),
    #"Grouped Rows" = Table.Group(#"Sorted Rows", {"Contract Number"}, {{"Data", each Table.FillDown(_,{"Level 1","Level 2","Level 3","Level 4"})}}),
    #"Expanded Data" = Table.ExpandTableColumn(#"Grouped Rows", "Data", {"Hierachy Level", "Index", "Level 1", "Level 2", "Level 3", "Level 4"}, {"Hierachy Level", "Index", "Level 1", "Level 2", "Level 3", "Level 4"})
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 -- China Power BI User Group