What is revoke and grant in DCL?

In Data Control Language (DCL), the commands GRANT and REVOKE are used to manage user permissions in a database. The GRANT command allows a database administrator to provide specific privileges to users or roles, enabling them to perform certain actions, such as SELECT, INSERT, or DELETE on database objects. Conversely, the REVOKE command removes previously granted permissions, restricting users' access to the specified database objects. Together, these commands help maintain security and control over database operations.