I’m not sure that I understand what you’re asking
You are using AS/400 query and creating a file
and you want an additional column with a note in it???
is this note the same for everyrow created???
here is a shot: select Define Result Fields
Create the field NOTE expression ‘This is a note’
Column Heading NOTE
Len 20 (or what ever you want)
on Select and sequence fields include the new field NOTE along with the others that you want.