Forum Discussion
How to use each expression in M Language
Hello Community,
I am learning M language (let-in structure), and I have a question relevant to 'each' expression
The online course/video I am taking, is teaching how to use each.
I try to use the same function and coding to group up something for a try.
But the Query gives me an error like this:
Saying "Expression.Error: There is an unknown identifier. Did you use the [field] shourthand for a _[field] outside of an 'each' expression?"
I am using Microsoft Office 365 ProPlus, Excel Version 1905.
Anybody can help me on the each expression blockage?
Hi Anonymous,
the problem is that the second parameter of Table.Group should be text instead of column identifier.
Custom1 = Table.Group(#"ChangedType", "Tasks", {"ML Test", each _})instead of
Custom1 = Table.Group(#"ChangedType", [Tasks], {"ML Test", each _})You can also read more about that in the PowerQuery Documentation: Table.Group
2 Replies
Hi Anonymous,
the problem is that the second parameter of Table.Group should be text instead of column identifier.
Custom1 = Table.Group(#"ChangedType", "Tasks", {"ML Test", each _})instead of
Custom1 = Table.Group(#"ChangedType", [Tasks], {"ML Test", each _})You can also read more about that in the PowerQuery Documentation: Table.Group
Tks sooo much Nolock. It works now.
At first I thought it's the each key expression went wrong.
Thank you very much.