If your application uses a relational database, odds are good that updating the application will require changing the database structure. While tools are available for migrating databases in most frameworks, there is no silver bullet.
Your database is often the most important part of your application in terms of actual value to the business. The value of the database will only increase over time, as long as it is adequately maintained. Your database administrator is in charge of this maintenance, and you’ll often find that the constraints under which they are operating are very different than yours.