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GulianiG
Helper II
Helper II

Can a custom column be added at a given location in table?

Hi All,

When I add a custom table, it gets added at the end of the table.

Is there a way for us to define in M-Code, where we want the column to be inserted instead of end?

1 ACCEPTED SOLUTION
Vijay_A_Verma
Super User
Super User

Yes, custom column is always added at the end and then you will have to reorder it. Below is a formula which combines these. Here I am inserting custom column at index position of 2.

= Table.ReorderColumns(Table.AddColumn(#"Changed Type", "Custom", each List.Sum(List.LastN(Record.ToList(_),3))),List.InsertRange(Table.ColumnNames(#"Changed Type"),2,{"Custom"}))

 See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test 

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Q", type text}, {"A", Int64.Type}, {"B", Int64.Type}, {"C", Int64.Type}, {"D", Int64.Type}, {"E", Int64.Type}, {"F", Int64.Type}, {"G", Int64.Type}}),
    Result = Table.ReorderColumns(Table.AddColumn(#"Changed Type", "Custom", each List.Sum(List.LastN(Record.ToList(_),3))),List.InsertRange(Table.ColumnNames(#"Changed Type"),2,{"Custom"}))
in
    Result

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2 REPLIES 2
v-jingzhang
Community Support
Community Support

Hi @GulianiG 

 

You can use Transform > Move to move the custom column to another position after creating it. This would be easier. https://docs.microsoft.com/power-query/move-columns 

 

After you move a column, you will see the code of this step. The columns display in the order of the column name list. You can also change the item order in the list to change their display order.

vjingzhang_0-1654755783185.png

 

Best Regards,
Community Support Team _ Jing
If this post helps, please Accept it as Solution to help other members find it.

Vijay_A_Verma
Super User
Super User

Yes, custom column is always added at the end and then you will have to reorder it. Below is a formula which combines these. Here I am inserting custom column at index position of 2.

= Table.ReorderColumns(Table.AddColumn(#"Changed Type", "Custom", each List.Sum(List.LastN(Record.ToList(_),3))),List.InsertRange(Table.ColumnNames(#"Changed Type"),2,{"Custom"}))

 See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test 

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Q", type text}, {"A", Int64.Type}, {"B", Int64.Type}, {"C", Int64.Type}, {"D", Int64.Type}, {"E", Int64.Type}, {"F", Int64.Type}, {"G", Int64.Type}}),
    Result = Table.ReorderColumns(Table.AddColumn(#"Changed Type", "Custom", each List.Sum(List.LastN(Record.ToList(_),3))),List.InsertRange(Table.ColumnNames(#"Changed Type"),2,{"Custom"}))
in
    Result

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