Table.Group possible to group except certain columns?

[Anonymous]

Hi all, 

I am sorry if this is a question asked before, but I can't find it. 

I use a Table.Group function in Power Query to group my table on three summarizations. But the table I am extracting from gets new attributes on a regular basis. Now I have to manual add these columns to the first part of the Table.Group function. 

Is there a possibility to add something like a Table.Group except the summarizations Lists? So when a new column gets added to the table in the datamart, and my dataset is refreshed, I don't have to add this manually?

Thanks!

[Jakinta · Accepted solution]

Cols = Table.ColumnNames(PreviousStep)
SumCols = {"Sum1","Sum2","Sum3"} // hardcoded or apply some filter to Cols list
GroupCols = List.Difference(Cols, SumCols)
Group = Table.Group ( PreviousStep, GroupCols, List.Transform ( SumCols, (Col)=> {Col, each List.Sum(_[Col]), type number}) )

[Anonymous]

Hi, thanks for this reaction. 

unfortunately, I run into an error:

Expression.Error: The column '_Col' of the table wasn't found. Details: _Col

I am not sure what is going wrong here, Col should not be a column but should represent the columns in SumCols of course..

--edit--

If I replace the List.Transform part with the individual Sum expressions (so I use the columns instead of the list), it works.. 

Thanks for the first part anyway, this was the most needed!