Which syntax turns an existing constraint on? ()A. ALTER TABLE table_name ENABLE constraint_name;B. ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;C. ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;D. ALTER TABLE table_name

题目
Which syntax turns an existing constraint on? ()

A. ALTER TABLE table_name ENABLE constraint_name;

B. ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;

C. ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;

D. ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;

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更多“Which syntax turns an existing constraint on? () ”相关问题

  • 第1题：

    Giventhetwosecurityconstraintsinadeployment&ensp

    Giventhetwosecurityconstraintsinadeploymentdescriptor：

    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-method

    whichtwo insertedindependentlyatline109，willallowuserswithrolenamesofeitherSALESorMARKETINGtoaccessthisresource？（）


    参考答案：B, D

  • 第2题：

    A) changes

    B) makes

    C) sets

    D) turns


    正确答案：B
    答案：B
    [试题分析] 动同辨析题。
    [详细解答] 这里需填入一个系动词，表示“使…怎么样”，所以，只有B项makes能填入。

  • 第3题：

    Youareresponsibleforadatawarehouseapplicationthatusesrecordsfromanexternaltabletoupdateoneofthedimensiontablesperiodically.Therecordsintheexternaltablemaycontaindatafornewrowsinthedimensiontable，orforupdatestoitsexistingrows.WhichtypeofSQLcommandwouldyouusetotransferthedatafromtheexternaltabletothedimensiontableasefficientlyaspossible？（）

    A.MERGE

    B.SELECT…CROSSJOIN

    C.INSERTALL…SELECT

    D.CREATEVIEW…CONSTRAINT


    参考答案：A

  • 第4题：

    GiventhesecurityconstraintinaDD：101.<security-constraint>102.<web-resource-collection>103.<web-resource-name>Foo</web-resource-name>104.<url-pattern>/Bar/Baz/*</url-pattern>105.<http-method>POST</http-method>106.</web-resource-collection>107.<auth-constraint>108.<role-name>DEVELOPER</role-name>109.</auth-constraint>110.</security-constraint>Andgiventhat"MANAGER"isavalidrole-name，whichfouraretrueforthissecurityconstraint？（）

    A.MANAGERcandoaGETonresourcesinthe/Bar/Bazdirectory.

    B.MANAGERcandoaPOSTonanyresourceinthe/Bar/Bazdirectory.

    C.MANAGERcandoaTRACEonanyresourceinthe/Bar/Bazdirectory.

    D.DEVELOPERcandoaGETonresourcesinthe/Bar/Bazdirectory.

    E.DEVELOPERcandoonlyaPOSTonresourcesinthe/Bar/Bazdirectory.

    F.DEVELOPERcandoaTRACEonanyresourceinthe/Bar/Bazdirectory.


    参考答案：A, C, D, F

  • 第5题：

    【C9】

    A．changes

    B．makes

    C．sets

    D．turns


    正确答案：B
    A项changes意为“改变，更换，变化”；B项makes意为“使显得……，使……像……，使……成(……的状态)”；C项sets可以用于“动词+名词(宾语)+形容词(宾补)”的结构，但很少见，意为“使……成(某种状态)”；D项turns意为“使变颜色，变味/变质，把……改变成……”。

  • 第6题：

    The beautiful mountain village__________ we spent our holiday last year is locatedin __________ is now part of Guangxi.

    A.which ; where
    B.where; what
    C.that ; what
    D.when ; which

    答案：B
    解析：
    where在此充当地点状语，what既充当located in的宾语又充当is的主语，本题考查定语从句和名词性从句。mountain village在定语从句we spent our holiday last year作地点状语，故用关系副词where：第二个考查宾语从句，从句中缺少主语，故用what作主语。故选B。

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