Help with expanding json list columns

Hello jereaallikko 

I don't know exactly how this list is structured, but I suppose it contains records with 2 fields. one called "id", the other one "label". If it's like this, this transformation should work out. Check out this code

let 
    YourTable = #table(type table[ID=  text, Column1=  list ], {{"ID12345", {[id= 1234, label= "testlabel"], [id= 1237, label= "testlabel7"]}},{"ID12346", {[id= 1235, label= "testlabel1235"]}}}),
    TransformListOfRecordsToText = Table.TransformColumns
    (
        YourTable,
        {
             {
                 "Column1",
                 (listint)=>Text.Combine(List.Transform(listint, each  Record.Field(_,"label")), "#(lf)")
             }
        }
    )
in
    TransformListOfRecordsToText

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