yes Albert,
You can do this if you know the right table and schema in which this Note stored.
You can fire back end SQL query/ script to do this . I am here giving one eg. for your ref.
If you wanted to delete all notes table and its contents the below query will help you.
Her EXAMPLE is table(Note table)
DROP TABLESPACE "EXAMPLE" INCLUDING CONTENTS.
You need to studey the your DB and its table and prepare one SQL query to perform your task.
your concern complicated but possible to achieve.