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New Member

How to set var to select column name?

in power query, if I want to operate one column, we will  use _[columnName].

but if I want operate many column, I want use List.Transform({columnName1, columaname2},(t)=> operate(Table, [t]).

how to pass columnName var to operator this column?

Super User
Super User

List.Transform({Column1,Column2},each List.Sum(Table.Column(tbl,_)))

Super User
Super User

You can try


each (row)=> List.Tranform({row[Column1], row[Column2]}=> operate(Table, [t]))



I’m usually answering from my phone, which means the results are visualized only in my mind. You’ll need to use my answer to know that it works—but it will work!!

[t]  , the t is only as a str, not as a var.

Super User
Super User

If you can explain what exactly you are trying to do, then experts here can suggest the right solution. 

When you are doing List.Transform({columnName1, columaname2},(t)=>, it is t which contains columnName1 & 2 one by one and whatever you are operating on t will be applicable on columnName1 & 2.

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