单选题The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command:  SQL GRANT SELECT,INSERT,UPDATE ON emp TO scott WITH GRANT OPTION; The user SCOTT executes this command to grant privileges to the user JIM: SQL GRANT SELECT,INSERT,UPDATE ON hr.emp TO jim;  Now, the user HR decides to revoke privileges from JIM using this command: SQL REVOKE SELECT,INSERT,UPDATE ON emp FROM jim; Which statement is true after HR issues the REVOKE command()AThe command fails because SCOTT still has privileges.BThe command succeeds and privileges are revoked from JIM.CThe command fails because HR cannot revoke the privileges from JIM.DThe command succeeds and only HR has the privilege to perform the SELECT, INSERT, and UPDATEoperations on the EMP table.

单选题
The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command:  SQL> GRANT SELECT,INSERT,UPDATE ON emp TO scott WITH GRANT OPTION; The user SCOTT executes this command to grant privileges to the user JIM: SQL> GRANT SELECT,INSERT,UPDATE ON hr.emp TO jim;  Now, the user HR decides to revoke privileges from JIM using this command: SQL> REVOKE SELECT,INSERT,UPDATE ON emp FROM jim; Which statement is true after HR issues the REVOKE command()
A

The command fails because SCOTT still has privileges.

B

The command succeeds and privileges are revoked from JIM.

C

The command fails because HR cannot revoke the privileges from JIM.

D

The command succeeds and only HR has the privilege to perform the SELECT, INSERT, and UPDATEoperations on the EMP table.


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多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT, ROLLBACK, orany data definition language (DDL) command: SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno; SCOTT has opened another session to work with the database instance.  Which three operations would waitwhen issued in SCOTT’s second session()ALOCK TABLE emp IN SHARE MODE;BLOCK TABLE emp IN EXCLUSIVE MODE;CUPDATE emp SET sal=sal*1.2 WHERE job=ANAGER?UPDATE emp SET sal=sal*1.2 WHERE job=?ANAGER?DINSERT INTO emp(empno,ename) VALUES (1289,’Harry’);ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno