Return a Split Column After Transformation

[pbrenneise]

Hi folks, 

Is there an efficient way to return a previously split column (by row) back to a comma-separated list in a single cell after performing transformations on it? I have a table like the following, which I split by delimiter into rows so I could perform Left Outer Joins via the Merge Query utility in order to identify the users by another table:

Initial Table:

JobID	Other Users
111	UserID1, UserID2
222	UserID3, UserID5, UserID6

Resulting Table After Splitting "Other Users" Column And Performing Outer Joing with Other Table to ID users:

Job ID	Other Users	User Names
111	UserID1	Steve
111	UserID2	Sally
222	UserID3	Juan
222	UserID5	Eric
222	UserID6	Tran

Desired Result (for the purposes of the report, it needs to return to this format):

Job ID	User Names
111	Steve, Sally
222	Juan, Eric, Tran

I am not sure how to get that final result so any insights would be appreciated. Thanks!

[Greg_Deckler · Accepted solution]

@pbrenneise Do a Group By step like this:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQ0VNJRCi1OLfJ0AbGCS1LLUpVidVBljEAyiTk5lWAZIyMjuIwxkOVVmpiHIWEKZLkWZSZjSJgBWSFFIB2xAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Job ID" = _t, #"Other Users" = _t, #"User Names" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Job ID", Int64.Type}, {"Other Users", type text}, {"User Names", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Job ID"}, {{"User Names", each Text.Combine([User Names], ", "), type nullable text}})
in
    #"Grouped Rows"