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● 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;


参考答案

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