DCL commands are used to granting and revoking the permissions.
This is used to grant the privileges to other users.
Grant <privileges> on <object_name> to <user_name> [with grant option];
SQL> grant select on student to sudha; -- you can give individual privilege
SQL> grant select, insert on student to sudha; -- you can give set of privileges
SQL> grant all on student to sudha; -- you can give all privileges
The sudha user has to use dot method to access the object.
SQL> select * from saketh.student;
The sudha user can not grant permission on student table to other users. To get this type of option use the following.
SQL> grant all on student to sudha with grant option;
Now sudha user also grant permissions on student table.
This is used to revoke the privileges from the users to which you granted the privileges.
Revoke <privileges> on <object_name> from <user_name>;
SQL> revoke select on student form sudha; -- you can revoke individual privilege
SQL> revoke select, insert on student from sudha; -- you can revoke set of privileges
SQL> revoke all on student from sudha; -- you can revoke all privileges