题目内容

若要将部门表Demp中name列的修改权限赋予用户Ming。并允许Ming将该限授予他人。实现的SQL语句如下:GRANT()ON TABLE Demp TO Ming(请作答此空)

A. FOR ALL
B. CASCADE
C. WITH GRANT OPTION
D. WITH CHECK OPTION

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给定关系模式R <U,F>,其中,属性集U={A、B、C、D、E}。函数依赖集F={AC→B,B→DE}。关系R(请作答此空)且分别有()

A. 只有一个候选关键字AC。
B. 只有一个候选关键字AB。
C. 有两个候选关键字AC、BC。
D. 有两个候选关键字AC、AB

An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the

A. the database management system
B. the feasibility of techniques used
C. the network topology and technology
D. the user interface and process methods

An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the

A. context DFD
B. system DFD
C. network architecture DFD
D. event-response DFD

An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the

A. vertical partitioning and horizontal replication
B. vertical replication and horizontal partitioning
C. integration and distribution
D. partitioning and replication

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