Merge values from rows into one row

Hi jaryszek ,

Please try:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXJJLcjJr8xNzSsp9k0sUIrViVYywy5sjF3Y0NrI2tjaxNoUu7QRUNjRyRnMNoGxYwE=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type text}}),
    #"Split Column by Delimiter" = Table.ExpandListColumn(Table.TransformColumns(#"Changed Type", {{"Column1", Splitter.SplitTextByDelimiter(";", QuoteStyle.Csv), let itemType = (type nullable text) meta [Serialized.Text = true] in type {itemType}}}), "Column1"),
    #"Removed Duplicates" = Table.Distinct(#"Split Column by Delimiter"),
    #"Grouped Rows" = Table.Group( #"Removed Duplicates", {"Column2"}, {{"Combined", each Text.Combine(List.Sort(List.Distinct([Column1])), ";")}})
in
    #"Grouped Rows"

Best Regards,
Eyelyn Qin
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