Import Max Value Records from Source data

Hello negi007 

you can use Table.Group to make this in power Query. However you have to check if query folding is talking place, otherwise you have to go for the solution of StefanoGrimaldi, and directly make a SQL statement. Here a code example

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlRQ0lEKCHIB00YGSrE60UpGUDEwbQIRM4aKGSOpM0HWawoRM0VWZwYRM0M2zxwoFgsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Index " = _t, #"Product ID " = _t, Value = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Index ", Int64.Type}, {"Product ID ", type text}, {"Value", Int64.Type}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Product ID "}, {{"MaxValue", each Table.Max(_, "Value"), type record}}),
    #"Expanded MaxValue" = Table.ExpandRecordColumn(#"Grouped Rows", "MaxValue", {"Index ", "Value"}, {"Index ", "Value"})
in
    #"Expanded MaxValue"

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

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Have fun

Jimmy