Which of the following is true of an index used to support a UNIQUE constraint?()A.It must have the UNIQUE attribute.B.It cannot be created explicitly by the user.C.It must have the UNIQUE and CLUSTER attributes.D.It must have the UNIQUE WHERE NOT NULL at

题目
Which of the following is true of an index used to support a UNIQUE constraint?()

A.It must have the UNIQUE attribute.

B.It cannot be created explicitly by the user.

C.It must have the UNIQUE and CLUSTER attributes.

D.It must have the UNIQUE WHERE NOT NULL attribute.

相似考题

1.The board room can _____fifty people.A.makeB.holdC.putD.support

2.You’re going to have a quiz ( )by another two in the ( )month.A. followed,followedB. followed,followingC. following,followedD. following,following

3.Giventhetwosecurityconstraintsinadeployment&enspGiventhetwosecurityconstraintsinadeploymentdescriptor：101.<security-constraint>102.<!--acorrecturl-patternandhttp-methodgoeshere-->103.<auth-constraint><role-name>SALES</role-name></auth-.<auth-constraint>104.<role-name>SALES</role-name>105.</auth-constraint>106.</security-constraint>107.<security-constraint>108.<!--acorrecturl-patternandhttp-methodgoeshere-->109.<!--Insertanauth-constrainthere-->110.</security-constraint>Ifthetwosecurityconstraintshavethesameurl-patternandhttp-methodwhichtwo insertedindependentlyatline109，willallowuserswithrolenamesofeitherSALESorMARKETINGtoaccessthisresource？（）

4.________________[A] support [B] cry [C] plea [D] wish

更多“Which of the following is true of an index used to support a UNIQUE constraint?() ”相关问题

  • 第1题：

    The ice is not thick enough to bear the weight of a tank.

    A:suffer
    B:accept
    C:receive
    D:support

    答案：D
    解析：

  • 第2题：

    The group does not advocate the use of violence.

    A:limit
    B:regulate
    C:oppose
    D:support

    答案：D
    解析：
    本句意思：该团体不支持使用暴力。advocate意思为“支持，拥护，提倡”，与support（支持，拥护）意思相近。 limit限制，限定；regulate约束，控制；oppose反对，抵制。

  • 第3题：

    若要按Esc键时执行命令按钮的单击事件过程，则需将（）属性设置为True。

    A．Cancel

    B．Value

    C．Left

    D．Index


    Cancel

  • 第4题：

    You have to be patient if you want to sustain your position.

    A:maintain
    B:establish
    C:acquire
    D:support

    答案：A
    解析：
    本句意思：要保住自己的职位，你必须有耐心。maintain维持；establish建立；acquire习 得；support支持。

  • 第5题：

    5、下列选项中，用于定义唯一索引的是

    A．由Key定义的索引

    B．由Union定义的索引

    C．由Unique定义的索引

    D．由Index定义的索引


    由 Unique 定义的索引

  • 第6题：

    a=[1,1,1,2,2,2,3,3,3] b=a.count（3) c=a.index（3) 则b和c的值分别是_____.

    A．3,6

    B．3,7

    C．True,6

    D．1,7


    11000000

相关内容