concatenate value in column

Anonymous - You can do with Power Query 

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wcs7PKylKTC4pVjBU0lHyzCtLLSpJLVLwMdTxMVKK1cGtwBifbHBpQUFOJZoKI6CKECAzG4f5KPLoxiNLwkyPBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Contracts = _t, #"Scope of Work" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Contracts", type text}, {"Scope of Work", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Contracts"}, {{"Grouped", each _, type table [Contracts=nullable text, Scope of Work=nullable text]}}),
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each Table.ToList(Table.SelectColumns([Grouped],"Scope of Work"),Combiner.CombineTextByDelimiter(","))),
    #"Extracted Values" = Table.TransformColumns(#"Added Custom", {"Custom", each Text.Combine(List.Transform(_, Text.From), "+"), type text}),
    #"Removed Columns" = Table.RemoveColumns(#"Extracted Values",{"Grouped"}),
    #"Replaced Value" = Table.ReplaceValue(#"Removed Columns","""","",Replacer.ReplaceText,{"Custom"})
in
    #"Replaced Value"