In general, database updates take only several seconds, so "during" the update, there is not so much to display, or not enough time for the user to see and make it worth. On the contrary, I'd rather keep working. Why bother me if everything is OK?
OTOH, if there is an error, then a tray notification should appear. And if the update *finished* successfully, then there is a tray notification too. Of course, you can change these settings.
But since this is all by default, I sincerely wonder why you are asking this, specially since you have the help file to read it.