请用SQL的GRANT和REVOKE语句（加上视图机制）完成以下授权定义或存取控制功能
请用SQL的GRANT和REVOKE语句（加上视图机制）完成以下授权定义或存取控制功能
相关考题：
● 撤销 U5 对 Emp 表的查询权限，并收回 U5 授予其它用户的该权限，SQL 语句是 （51） 。（51）A. REVOKE SELECT ON TABLE Emp FROM U5 CASCADE;B. REVOKE SELECT ON TABLE Emp FROM U5 RESTRICT;C. REVOKE QUERY ON TABLE Emp FROM U5 CASCADE;D. GRANT SELECT ON TABLE Emp TO U5 WITH GRANT OPTION;
20 ） 下列 SQL 语句中 ， 能够实现 “ 收回用户 WANG 对学生表 （ STUDENT ） 中学号 （ XH ） 的修改权 ” 这一功能的是A ) GRANT UPDATE ( XH ) ON STUDENT TO WANGB ) GRANT UPDATE ( XH ) ON TABLE TO WANGC ) REVOKE UPDATE ( XH ) ON STUDENT FROM WANGD ) REVOKE UPDATE ( XH ) ON TABLE TO WANG
The user Sue issues this SQL statement:GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement:GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement:GRANT SELECT ON sue. EMP TO timber;The user Sue issues this SQL statement:REVOKE select on sue. EMP FROM alice;For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）A. Alice onlyB. Alice and ReenaC. Alice, Reena, and TimberD. Sue, Alice, Reena, and Timber
下列SQL语句中，能够实现“收回用户WANG对学生表(STUDENT)中学号(XH)的修改权”这一功能的是( )。A．GRANT UPDATE(XH) ON STUDENT TO WANGB．GRANT UPDATE(XH) ON TABLE TO WANGC．REVOKE UPDATE(XH) ON STUDENT FROM WANGD．REVOKE UPDATE(XH) ON TABLE FROM WANG
单选题The user Sue issues this SQL statement: GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement: GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement: GRANT SELECT ON sue. EMP TO timber; The user Sue issues this SQL statement: REVOKE select on sue. EMP FROM alice; For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）AAlice onlyBAlice and ReenaCAlice, Reena, and TimberDSue, Alice, Reena, and Timber
单选题创建角色可以（）。A使用GRANT语句B使用REVOKE语句C使用ALTER语句D使用CREATE语句