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    Data Control Language Commands

    DCL commands used to control the data access and database transaction control.
    Grant: Grant command is used to assign privileges to users to access a database object.
    Grant insert, update on student_info to HR_teacher;
    Grant all on employees to system;
    Grant on Column level:
    Grant update(salary,commission)on employees to system;

    Revoke: Revoke command is used to retrieve the privileges assigned to the users on a database objects.
    revoke all on employee from system;
    revoke insert, update on student_info from HR_teacher;
    Revoke on column level:
    Revoke update(salary,commission) on employees from system;

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