Which constraint can be defined only at the column level? ()A. UNIQUEB. NOT NULLC. CHECKD. PRIMARY KEYE. FOREIGN KEY

题目
Which constraint can be defined only at the column level? ()

A. UNIQUE

B. NOT NULL

C. CHECK

D. PRIMARY KEY

E. FOREIGN KEY

相似考题

1.信令链路的定位属于()A.LEVEL1B.LEVEL2C.LEVEL3

2.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？（）

3.Whichtypeofbackupmustbeperformedfirstwithanincrementalbackup?()A.Level1B.Level0C.Level2D.Level3

4.下列选项中,不属于Levels阶段的是()。A、Level1B、Level2C、Level3D、Level4

更多“Which constraint can be defined only at the column level? () ”相关问题

  • 第1题：

    An IS-IS router is adjacent to and passing traffic with a neighbor. You perform a show isis interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level(s) is enabled on these interfaces?（）

    A. Level 1 only

    B. Level 2 only

    C. Level 1 and Level 2

    D. Level 3 only


    参考答案：C

  • 第2题：

    According to JUNOS software route selection algorithm, which IS－IS route type is most preferred?()

    A. Level 1 internal routes

    B. Level 1 external routes

    C. Level 2 internal routes

    D. Level 2 external routes


    参考答案：A

  • 第3题：

    在IS－IS协议中,包含哪几种IS路由器的类型()。

    A.Level-1

    B.Level-2

    C.Level-3

    D.Level-1-2


    参考答案：A, B, D

  • 第4题：

    AnIS－ISrouterisadjacenttoandpassingtrafficwithaneighbor.Youperformashowis interfacedetailcommandandnoticethatforsomeinterfacesyouhaveacircuittypeof3.WhichIS－ISlevel(s)isenabledontheseinterfaces?()

    A.Level1only

    B.Level2only

    C.Level1andLevel2

    D.Level3only


    参考答案：C

  • 第5题：

    Which IS － IS router is equivalent to an ABR in OSPF?()

    A. Level 2 - 3

    B. Level 1 - 2

    C. Level 2

    D. Level 0

    E. Level 3

    F. Level 1


    参考答案：B

  • 第6题：

    设置多列布局的属性值为（）。

    A．columns-width

    B．column-count

    C．column-gap

    D．column-rule


    A 解析：Columns属性返回或设置一个值，以决定控件是水平还是垂直滚动以及如何显示列中的项目。Columns属性值为0时，控件为垂直滚动；Columns属性等于1时，则列表框呈多行多列显示： Columns属性值大于1时，为水平滚动，Columns属性值的数量决定在控件中的可见宽度内显示列的数量。Columns属性用来确定列表框的列数。

相关内容