Filter a table by grouping rows: aggregation plus calculations

Hello pescadicto 

you have to add one more function to the group function, that takes the grouped table. Afterwards you can expand it again. Here a example

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUUpMAxKGSrE60UpOQFZSmiGQNELiGwFJYzDfGchKBik3AXNdgKwUsHJTOD8ZrNxMKTYWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, Feature1 = _t, Feature2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ID", type text}, {"Feature1", type text}, {"Feature2", Int64.Type}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"ID"}, {{"NewFeature", each List.Sum([Feature2]), type number}, {"AllRows", each _, type table [ID=text, Feature1=text, Feature2=number]}}),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Grouped Rows", "AllRows", {"Feature1", "Feature2"}, {"Feature1", "Feature2"}),
    #"Reordered Columns" = Table.ReorderColumns(#"Expanded AllRows",{"ID", "Feature1", "Feature2", "NewFeature"})
in
    #"Reordered Columns"

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

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Kudoes are nice too

Have fun

Jimmy

Hello pescadicto 

check out this dynamic solution. Note, that in the expand-function I had to delete the "ID", otherwise this column would be double and the program throw and error

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUUpMAxKGSrE60UpOQFZSmiGQNELiGwFJYzDfGchKBik3AXNdgKwUsHJTOD8ZrNxMKTYWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, Feature1 = _t, Feature2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ID", type text}, {"Feature1", type text}, {"Feature2", Int64.Type}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"ID"}, {{"NewFeature", each List.Sum([Feature2]), type number}, {"AllRows", each _, type table [ID=text, Feature1=text, Feature2=number]}}),
    GetColumnNamesOfTableToBeExpanded = List.Distinct(List.Combine(List.Transform(#"Grouped Rows"[AllRows], each Table.ColumnNames(_)))),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Grouped Rows", "AllRows",List.Difference(GetColumnNamesOfTableToBeExpanded, {"ID"}), List.Difference(GetColumnNamesOfTableToBeExpanded, {"ID"})),
    #"Reordered Columns" = Table.ReorderColumns(#"Expanded AllRows",{"ID", "Feature1", "Feature2", "NewFeature"})
in
    #"Reordered Columns"

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

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy