What is true about updates through a view? ()A. You cannot update a view with group functions.B. When you update a view group functions are automatically computed.C. When you update a view only the constraints on the underlying table will be in effect.D.

题目
What is true about updates through a view? ()

A. You cannot update a view with group functions.

B. When you update a view group functions are automatically computed.

C. When you update a view only the constraints on the underlying table will be in effect.

D. When you update a view the constraints on the views always override the constraints on the underlying tables.

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参考答案和解析
参考答案：A
更多“What is true about updates through a view? () ”相关问题

  • 第1题：

    What is themostlikelyreasonforthedispartlybetweentheactualnetworknumbersatthebranchesandtheroutesintheroutingtableonGateway－Router?()

    A.Branch-Router2isconfiguredtosendbothRIPv1andRIPv2updates.

    B.Gateway-RouterisconfiguredtoonlyreceiveRIPv2updates.

    C.Gateway-routerisconfiguredtoreceiveonlyRIPv1updates.

    D.Branch-Router1isconfiguredtoonlysendRIPv1updates.


    参考答案：D

  • 第2题：

    要隐藏view组件中的内容，应该将view组件的（）属性设置为true？

    A．hidden

    B．display

    C．height

    D．width


    hidden

  • 第3题：

    要隐藏view组件中的内容，应该将view组件的（）属性设置为true？

    A．hidden

    B．width

    C．display

    D．height


    A

  • 第4题：

    已知a = np.arange（12)， c = a.view（) ，那么 “c is a” 的结果为True。


    A

  • 第5题：

    要隐藏view组件中的内容，应该将view组件的（）属性设置为true。

    A．hidden

    B．display

    C．height

    D．width


    A

  • 第6题：

    已知a = np.arange（12) c = a.view（) 那么c is a 的结果为True.


    A

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