List value if conditions are true

Hello Rune_ 

you can use Table.Pivot to solve this issue.

What I didn't get was why D000258 is not shown in your final table

Here the code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcjEwMDAyNVXSUXL09Q/1C/H0c/YJcwwB8g1NTUyUYnWQlTiHBgU5+7u4AploMi6hri6OISAJAzM9A1M9IwNDC6XYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Document No_" = _t, Code = _t, #"Value (Text)" = _t]),
    #"Pivoted Column" = Table.Pivot(Source, List.Distinct(Source[Code]), "Code", "Value (Text)"),
    #"Changed Type" = Table.TransformColumnTypes(#"Pivoted Column",{{"AMOUNTINCLVAT", type number}, {"CURRCODE", type text}, {"DUEDATE", type date}})
in
    #"Changed Type"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

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Kudoes are nice too

Have fun

Jimmy