Data Control Language

Data Control Language (DCL)

Introduction

Data Control Language (DCL) is a subset of SQL used to control access to a database.

DCL Commands

• GRANT: Used to grant privileges to database users.
• REVOKE: Used to revoke privileges from database users.

GRANT Command

• GRANT PRIVILEGES: Used to grant specific privileges to database users.
• TO: Specifies the user or role to whom the privileges are being granted.

REVOKE Command

• REVOKE PRIVILEGES: Used to revoke specific privileges from database users.
• FROM: Specifies the user or role from whom the privileges are being revoked.

Privileges

• SELECT: Allows users to retrieve data from a table.
• INSERT: Allows users to add new data to a table.
• UPDATE: Allows users to modify existing data in a table.
• DELETE: Allows users to delete data from a table.
• ALL PRIVILEGES: Grants all available privileges to a user.

Importance of DCL

• Security: DCL helps ensure database security by controlling access to sensitive data.
• Access Control: DCL allows administrators to grant or revoke privileges to database users.
• Data Protection: DCL helps protect data from unauthorized access and modifications.