# Database Users

There are 4 categories of database users based on their level of interaction with the database:

* **Application Programmers** They interact with the system through DML calls
* **Sophisticated Users**   They form requests in a database query language
* **Naive Users**   They invoke a previously written application program to access the data in the database
* **Database Administrator (DBA)**   The database administrator coordinates all the activities of the database system and has a good understanding of the enterprise’s information resources and needs. The DBA has the following duties: ● schema definition ● storage structure and access method definition ● schema and physical organization modification ● granting user authority to access the database ● specifying integrity constraints ● creating stored procedures ● acting as a liaison with users ● monitoring performance and responding to changes in requirements

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