Adding new column by summing a filtered column from another table

Hi Anonymous ,

You can try this query in the Records Table:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8nQxMDBU0lEyMTBQitWB8I2AfFMkvjGQbwTnV1RUAPnGIH4sAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Record ID" = _t, #"Max Score" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Record ID", type text}, {"Max Score", Int64.Type}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Category", each List.Distinct(Data[Category])),
    #"Expanded Category" = Table.ExpandListColumn(#"Added Custom", "Category"),
    #"Merged Queries" = Table.NestedJoin(#"Expanded Category", {"Record ID", "Category"}, Data, {"Record ID", "Category"}, "Data", JoinKind.LeftOuter),
    #"Expanded Data" = Table.ExpandTableColumn(#"Merged Queries", "Data", {"Score"}, {"Data.Score"}),
    #"Sorted Rows" = Table.Sort(#"Expanded Data",{{"Record ID", Order.Ascending}, {"Category", Order.Ascending}}),
    #"Added Custom1" = Table.AddColumn(#"Sorted Rows", "Total Cat Score", each let id = [Record ID] in List.Sum(Table.SelectRows(#"Sorted Rows", each [Record ID] = id)[Data.Score]),type number),
    #"Added Custom2" = Table.AddColumn(#"Added Custom1", "Cat", each "Cat " & [Category], type text),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom2",{"Category"}),
    #"Pivoted Column" = Table.Pivot(#"Removed Columns", List.Distinct(#"Removed Columns"[Cat]), "Cat", "Data.Score"),
    #"Reordered Columns" = Table.ReorderColumns(#"Pivoted Column",{"Record ID", "Max Score", "Cat A", "Cat B", "Cat C", "Cat D", "Cat E", "Total Cat Score"}),
    #"Added Custom3" = Table.AddColumn(#"Reordered Columns", "Pct Score", each [Total Cat Score] / [Max Score] * 100, type number)
in
    #"Added Custom3"

Best Regards,
Community Support Team _ Yingjie Li
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