If I were to not worry about the revision on the actual training document and just modify the date when a revision occurs, could I then create a conditional format (like in excel) that would highlight/ red flag any employee that needs retraining?
Thanks in advance!
Yes, but I personally wouldn't recommend doing this.
You can have a query return all classes. This query would be joined to your "Version" table (child table) to return the latest version date (top 1). This does what you are asking for, but still allows you to keep your version history.