Wipe lines in power query

[FelipMark]

I have a problem, where I have the following table:

| ID | A   | B   | C   | D   |
|----|-----|-----|-----|-----|
| 1  | aaa | null| null| null|
| 1  | null| bbb | null| null|
| 1  | null| null| ccc | null|
| 1  | null| null| null| ddd |
| 2  | aaa | null| null| null|
| 2  | null| bbb | null| null|
| 2  | null| null| ccc | null|
| 2  | null| null| null| ddd |

I want to transform in:

| ID | A   | B   | C   | D   | 
|----|-----|-----|-----|-----|
| 1  | aaa | bbb | ccc | ddd | 
| 2  | aaa | bbb | ccc | ddd |

Does anyone know how to do it?

[foodd · Accepted solution]

Try this:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8nRR0lFyBGInIHYGYhelWJ1oJQVDBQUgRyExMRFM55Xm5GDQyAphEklJSZgasCmE0cnJyQpEKYTRKSkpChCFRsS60YhYNxoR60YcClHdGAsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"ID | A   | B   | C   | D   |" = _t, Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t]),
    #"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars=true]),
    #"Unpivoted Columns" = Table.UnpivotOtherColumns(#"Promoted Headers", {"ID"}, "Attribute", "Value"),
    #"Filtered Rows" = Table.SelectRows(#"Unpivoted Columns", each ([Value] <> " null")),
    #"Pivoted Column" = Table.Pivot(#"Filtered Rows", List.Distinct(#"Filtered Rows"[Attribute]), "Attribute", "Value")
in
    #"Pivoted Column"

[AbhinavJoshi]

Hello @FelipMark. You can achieve this in Power Query Editior using Group By. Please see the full code and screenshot attached. I hope it helps!

let
Source = Excel.Workbook(File.Contents("C:\Users\AJoshi\Downloads\Ans.xlsx"), null, true),
Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
#"Changed Type" = Table.TransformColumnTypes(Sheet1_Sheet,{{"Column1", type text}}),
#"Promoted Headers" = Table.PromoteHeaders(#"Changed Type", [PromoteAllScalars=true]),
#"Changed Type1" = Table.TransformColumnTypes(#"Promoted Headers",{{"ID", Int64.Type}, {"A", type text}, {"B", type text}, {"C", type text}, {"D", type text}}),
#"Grouped Rows" = Table.Group(#"Changed Type1", {"ID"}, {{"A", each List.Min([A]), type nullable text}, {"B", each List.Min([B]), type nullable text}, {"C", each List.Min([C]), type nullable text}, {"D", each List.Min([D]), type nullable text}})
in
#"Grouped Rows"