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

[GulianiG]

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?

[v-jingzhang]

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.

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

[Vijay_A_Verma · Accepted solution]

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