Which SQL sublanguage is used to manage database access?

The correct answer focuses on the Data Control Language (DCL), which is specifically designed for managing access to data within a database. DCL commands, such as GRANT and REVOKE, allow administrators to define who can access certain data and what actions they can perform on it, thereby controlling the security and integrity of the database.

DCL plays a crucial role in maintaining sensitive information and ensuring that only authorized users have the ability to perform operations like querying or modifying data. This is especially important in areas where data privacy and security regulations must be followed.

In contrast, the other sublanguages serve different purposes:

• Data Definition Language (DDL) is used to define the database structure, including the creation, alteration, and deletion of tables and schemas.
• Data Query Language (DQL) is focused on retrieving data from the database, primarily through the SELECT statement.
• Data Manipulation Language (DML) deals with the manipulation of data itself, allowing for the insertion, update, and deletion of records.

Understanding this distinction clarifies why DCL is the right choice when discussing management of database access.