# 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 ![](https://474493875-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M5-0RGXrGEYT2sPemdS%2F-M5-0Rgnjb23s9oFr3lT%2F-M5-0_GPcLCrWSzqCVyS%2FDatabase%20Users.JPG?generation=1586990834402113\&alt=media) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://vikram-bajaj.gitbook.io/cs-gy-6083-principles-of-database-systems/main-1/dbms-internals/database-users.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.