Selecting top 2 people from each ID - DAX or PowerQuery

[Anonymous]

I have a table with IDs and names and I only want to pick top 2 names (alphabetically).. is there a way to achieve this via DAX or in Power Query? I can't do TOP N function since I need to merge several different tables later on so need a logic applied for each table before I merge them by ID. 

Any help/advice would be appreciated!

[AlexisOlson · Accepted solution]

Group by the ID column and choose All Rows as the Operation:

This is the result:

Tweak the generated code slightly to only get the top 2 names. Change "each _" to:

each Table.MinN(_, "Name", 2)

Expand the Name column (or all of the non-ID columns) and you're done!

Full sample code you can paste into the Advanced Editor of a new blank query:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXLMrVSK1YGwPRIzc1IR3ODEXDjbMbM4A8wxAnKcEOpAXOfMvBQEzyc1Fcw2BrJDEivhbI/EoiIEzzszF852zEmtQOLkZAINiAUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, Name = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ID", Int64.Type}, {"Name", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"ID"}, {{"Subtable", each Table.MinN(_, "Name", 2), type table [ID=nullable number, Name=nullable text]}}),
    #"Expanded Subtable" = Table.ExpandTableColumn(#"Grouped Rows", "Subtable", {"Name"}, {"Name"})
in
    #"Expanded Subtable"