How to code edit updates?

How to code edit updates?

As my application progresses, there are always changes to be made in the underlying forms.
 
A simple example: suppose I have First_Name which includes an initial and Last_Name. Assume also that I have a field Full_Name which is First_Name + " " + Last_Name. Lastly, suppose the users now don't want the middle initial. I can write code that eliminates the initial during the Edit:Validate phase, but it appears I have to click Edit/Submit on each record. Is there some way I can automate the system to go through each record so that the View is updated?
 
Thanks.