Extract table from column

Hi Anonymous 

There isn't one function to do this in a quick step. This below will walk you through the logic of it. Put this M code in a blank query:

1) In Power Query, select New Source, then Blank Query
2) On the Home ribbon, select "Advanced Editor" button
3) Remove everything you see, then paste the M code I've given you in that box.
4) Press Done

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUUosTklTitWJVnJC5jgjc0DKKioq4KpgbGcYOxYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Data = _t, Test = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Data", type text}, {"Test", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Data"}, {{"All Rows", each _, type table [Data=text, Test=text]}}),
    #"Added Just the Test Column as Table" = Table.AddColumn(#"Grouped Rows", "Test Column", each Table.SelectColumns([All Rows], "Test")),
    #"Added Transposed Table" = Table.AddColumn(#"Added Just the Test Column as Table", "Transposed Table", each Table.Transpose([Test Column])),
    #"Added Table as a List" = Table.AddColumn(#"Added Transposed Table", "Table as a List", each Table.ColumnNames([Transposed Table])),
    #"Added Concatenated Fields" = Table.AddColumn(#"Added Table as a List", "Concatenated Fields", each Table.CombineColumns([Transposed Table],[Table as a List], Combiner.CombineTextByDelimiter(","), "Test")),
    #"Expanded Custom.2" = Table.ExpandTableColumn(#"Added Concatenated Fields", "Concatenated Fields", {"Test"}, {"Test"})
in
    #"Expanded Custom.2"

Kind of the long way, but this is easier to read:

Start with step 1. The first few steps were just me slapping in some data to get a nested table with a single column really quickly.

1. This is the single column like yours.
2. Transposed this table
3. Converted the table to a list
4. Expanded the list and concantenated the fields together as I did
5. Expanded the final column giving you the asdf,xxx field.

This should work with multiple rows, not just two.

If you need further help, please post back with sample data.