如何按两列分组并列出另外两列的唯一值？

Question

我有这个 csv：

car     color  code city
ferrari pink   01   LA
ferrari red    02   LA
lambo   yellow 09  Texas
lambo   orange 08  Texas

我想在powerbi中进行这种分组，按汽车和城市分组，列出代码和颜色的唯一值并计算唯一行数。 预期产出：

car     color            code      city  count
ferrari [pink, red]      [01,02]   LA    2
lambo   [yellow, orange] [09,08]   Texas 2

也许 CONCATENEX ？但真的不知道

Answer 1

给你。

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSkstKkosylTSUSrIzMsGUoZA7OOoFKuDLFeUmgIkjRBSOYm5SflAbmVqTk5+OZBhCcQhqRWJxSjS+UWJeempQIYFQjoWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [car = _t, color = _t, code = _t, city = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"car", type text}, {"color", type text}, {"code", type text}, {"city", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"car", "city"}, {{"count", each Table.RowCount(_), Int64.Type}, {"color", each "["& Text.Combine( _[color],",")&"]", type text },{"code", each "["& Text.Combine( _[code],",")&"]", type text }}),
    #"Reordered Columns" = Table.ReorderColumns(#"Grouped Rows",{"car", "color", "code", "city", "count"})
in
    #"Reordered Columns"