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jamesbr
Frequent Visitor

Create columns dynamically from values

I have the following table structure:

 

2017-04-12_13-54-26.jpg

 

I want to transform it into single rows with new column 'lesson_score' with the assocated value in the row, so ultimately it would look something like this:

 

2017-04-12_13-58-35.jpg

 

Cannot work it out...  Help!

 

James

1 ACCEPTED SOLUTION
MarcelBeug
Community Champion
Community Champion

If you really want single rows, the code below results in:

 

Create columns dynamically from values 2.png

 

Edit: this won't load to the data model because of duplicate column names "Status" and "status".

I'll await further feedback first before any adjustment of the code.

 

Prerequisite: Names must be unique.

All steps are created using standard menu options, but I adjusted the code for the #"Filled Up" step to make it independent from the new column names.

 

let
    Source = Excel.Workbook(File.Contents("C:\Users\Marcel\Documents\Forum bijdragen\Power BI Community\Create columns dynamically from values.xlsx"), null, true),
    Table1_Table = Source{[Item="Table1",Kind="Table"]}[Data],
    #"Changed Type" = Table.TransformColumnTypes(Table1_Table,{{"Name", type text}, {"Status", type text}, {"Value Data", type text}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1),
    #"Filled Down" = Table.FillDown(#"Added Index",{"Name", "Status"}),
    #"Duplicated Column" = Table.DuplicateColumn(#"Filled Down", "Value Data", "Value Data - Copy"),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Duplicated Column", "Value Data - Copy", Splitter.SplitTextByDelimiter("=", QuoteStyle.Csv), {"Value Data - Copy.1", "Value Data - Copy.2"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Value Data - Copy.1", type text}, {"Value Data - Copy.2", Int64.Type}}),
    #"Pivoted Column" = Table.Pivot(#"Changed Type1", List.Distinct(#"Changed Type1"[#"Value Data - Copy.1"]), "Value Data - Copy.1", "Value Data - Copy.2"),
    #"Filled Up" = Table.FillUp(#"Pivoted Column",List.Skip(Table.ColumnNames(#"Pivoted Column"),Table.ColumnCount(#"Duplicated Column"))),
    #"Removed Columns" = Table.RemoveColumns(#"Filled Up",{"Value Data"}),
    #"Removed Duplicates" = Table.Distinct(#"Removed Columns", {"Name"}),
    #"Sorted Rows" = Table.Sort(#"Removed Duplicates",{{"Index", Order.Ascending}}),
    #"Removed Columns1" = Table.RemoveColumns(#"Sorted Rows",{"Index"})
in
    #"Removed Columns1"

 

Specializing in Power Query Formula Language (M)

View solution in original post

1 REPLY 1
MarcelBeug
Community Champion
Community Champion

If you really want single rows, the code below results in:

 

Create columns dynamically from values 2.png

 

Edit: this won't load to the data model because of duplicate column names "Status" and "status".

I'll await further feedback first before any adjustment of the code.

 

Prerequisite: Names must be unique.

All steps are created using standard menu options, but I adjusted the code for the #"Filled Up" step to make it independent from the new column names.

 

let
    Source = Excel.Workbook(File.Contents("C:\Users\Marcel\Documents\Forum bijdragen\Power BI Community\Create columns dynamically from values.xlsx"), null, true),
    Table1_Table = Source{[Item="Table1",Kind="Table"]}[Data],
    #"Changed Type" = Table.TransformColumnTypes(Table1_Table,{{"Name", type text}, {"Status", type text}, {"Value Data", type text}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1),
    #"Filled Down" = Table.FillDown(#"Added Index",{"Name", "Status"}),
    #"Duplicated Column" = Table.DuplicateColumn(#"Filled Down", "Value Data", "Value Data - Copy"),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Duplicated Column", "Value Data - Copy", Splitter.SplitTextByDelimiter("=", QuoteStyle.Csv), {"Value Data - Copy.1", "Value Data - Copy.2"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Value Data - Copy.1", type text}, {"Value Data - Copy.2", Int64.Type}}),
    #"Pivoted Column" = Table.Pivot(#"Changed Type1", List.Distinct(#"Changed Type1"[#"Value Data - Copy.1"]), "Value Data - Copy.1", "Value Data - Copy.2"),
    #"Filled Up" = Table.FillUp(#"Pivoted Column",List.Skip(Table.ColumnNames(#"Pivoted Column"),Table.ColumnCount(#"Duplicated Column"))),
    #"Removed Columns" = Table.RemoveColumns(#"Filled Up",{"Value Data"}),
    #"Removed Duplicates" = Table.Distinct(#"Removed Columns", {"Name"}),
    #"Sorted Rows" = Table.Sort(#"Removed Duplicates",{{"Index", Order.Ascending}}),
    #"Removed Columns1" = Table.RemoveColumns(#"Sorted Rows",{"Index"})
in
    #"Removed Columns1"

 

Specializing in Power Query Formula Language (M)

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