A database administrator (DBA) is responsible for the overall management of a database or databases within an organization. This includes ensuring the integrity, security, and performance of the database, as well as planning for future expansion and upgrades.

Database designers are responsible for designing and creating the logical and physical structure of a database. This includes determining the data types and attributes for each piece of data, as well as how the data will be organized and related to one another.

Both DBAs and database designers must work closely with the users of the database to understand their needs and requirements, and to ensure that the database is able to meet those needs effectively. They must also be able to troubleshoot problems and solve issues as they arise. Additionally, both DBAs and database designers should have a good understanding of database management systems and the underlying hardware and software infrastructure in order to be able to effectively manage and design databases.