Final answer:
In database management, you can update, drop tables, or delete data rather than overwriting an existing database. Creating backups is advised before making major changes.
Step-by-step explanation:
When working with databases, it is generally not possible to choose to overwrite an existing database directly. Instead, you can take actions such as updating records, dropping tables, or deleting data. Moreover, some database management systems allow you to create a backup of the current database before making significant changes, which ensures that you can restore to the previous state if necessary. It is also possible to drop the entire database and create a new one, though this is a much more drastic action and will remove all existing data.