[Zope] Change URL after SQL statement execution?

Good Morning List. I am trying to do something very simple. I have three files: 1/An SQL statement that I pass parameters too 2/A form that I use to collect the parameters that are passed to the script 3/A Script that is called from the form to run the SQL statement 4/A Page Template

From my python script I call the SQL using:

context.MySQLStatement(first_name=First, last_name=Last) It works fine with regards to running the SQL but if the resulting page is refreshed it runs the SQL again. How do I avoid this? If I cange the URL I figure it avoids this problem but dont know how to do this? Any help would be much appreciated, Kind Regards, Rob