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You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=". What happens when the main query is executed? ()A. The main query executes with the first value returned by the subquery.B. The main query executes with

题目
You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=". What happens when the main query is executed? ()

A. The main query executes with the first value returned by the subquery.

B. The main query executes with the last value returned by the subquery.

C. The main query executes with all the values returned by the subquery.

D. The main query fails because the multiple-row subquery cannot be used with the comparison operator.

E. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.


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  • 第1题:

    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:

    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

    答案:A
    解析:
    总体目标的三个"W"分别指who-对象;what-实现什么变化;when-实现变化的期限。

  • 第3题:

    计划的主要内容包括______计划必须清楚的确定和描述这些内容。

    A.What,Why,Who,Where,When,How many,How much

    B.What,Why,We,Where,When,How to,How much

    C.What,Why,We,Where,When,How,How much

    D.What,Why,Who,Where,When,How,How much


    确定组织发展目标制定全局战略;开发出一组广泛的相关计划;制定战略实施和资源分配方案

  • 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
    解析:总体目标的三个“W”分别指who-对象;what-实现什么变化;when-实现变化的期限。

  • 第5题:

    query()的作用是执行SQL语句,并返回结果集或不返回结果集。


    正确

  • 第6题:

    计划的主要内容包括______,计划必须清楚地确定和描述这些内容。

    A.What, Why, Who, Where, When, How many, How much

    B.What, Why, We, Where, When, How to, How much

    C.What, Why, We, Where, When, How, How much

    D.What, Why, Who, Where, When, How, How much


    ACD