What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?()A.A check constraint on the EMPLOYEE tableB.A

题目

What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?()

A.A check constraint on the EMPLOYEE table

B.A unique constraint on the EMPLOYEE table WORKDEPT column

C.A foreign key reference from the DEPARTMENT tables DEPTNO column to the WORKDEPT column of the EMPLOYEE table

D.A foreign key reference from the EMPLOYEE tables WORKDEPT column to the DEPTNO column of the DEPARTMENT table


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    健康计划的总体目标中的三个"W"指

    A、who,what,when

    B、what,when,why

    C、who,what,which

    D、what,when,where

    E、when,where,which


    参考答案:A

  • 第2题:

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    AC

  • 第3题:

    查找引⽤函数的搜索查找范围是由()参数指定的。

    A.Table_array

    B.Index_number

    C.Row_number

    D.Range_lookup


    Table_array

  • 第4题:

    健康计划的总体目标中的三个“W”指

    A:what,when,where

    B:who,what,when

    C:when,where,which

    D:who,what,which

    E:what,when,why


    正确答案:B
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  • 第5题:

    1、现在需要对xml文档中所有的chapter元素排序后再利用for-each进行循环,要求排序依据为chapter下名为“no”的子元素,且按数值类型进行排序。能实现该功能的选项为()。

    A.<for-each select="//chapter"> <sort data-type="number" select="//no" /> </for-each>###SXB###B.<for-each select="//chapter"> <sort data-type="number" select="/no" /> </for-each>###SXB###C.<for-each select="/chapter"> <sort data-type="number" select="no" /> </for-each>###SXB###D.<for-each select="
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  • 第6题:

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    A.<for-each select="//chapter"> <sort data-type="number" select="//no" /> </for-each>

    B.<for-each select="//chapter"> <sort data-type="number" select="/no" /> </for-each>

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    结构