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Anonymous's avatar
Anonymous
Not applicable
5 years ago
Solved

Table.Group possible to group except certain columns?

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 extract...
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  • Jakinta's avatar
    Jakinta
    5 years ago
    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}) )
Jakinta's avatar
Jakinta
Solution Sage
5 years ago
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's avatar
    Anonymous
    Not applicable
    5 years ago

    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!