Which three statements about subqueries are true?()A、A single row subquery can retrieve only one column and one row.B、A single row subquery can retrieve only one row but many columns.C、A multiple row subquery can retrieve multiple rows and multiple column

题目

Which three statements about subqueries are true?()

  • A、A single row subquery can retrieve only one column and one row.
  • B、A single row subquery can retrieve only one row but many columns.
  • C、A multiple row subquery can retrieve multiple rows and multiple columns.
  • D、A multiple row subquery can be compared by using the ">" operator.
  • E、A single row subquery can use the IN operator.
  • F、A multiple row subquery can use the "=" operator.

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    • D、It has a lower default administrative distance than RIP version 1.
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    B

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    D

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    A

    EBGP sessions between confederation sub ASs do not modify the next-hop attribute.

    B

    By default, iBGP sessions change the next-hop attribute learned from eBGP peers to self address.

    C

    By default, the next-hop attribute is not changed when a prefix is reflected by the route reflector

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    EBGP sessions between confederation sub ASs change the next-hop attribute to peer address.

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    A

    The order of the terms in a policy is irrelevant

    B

    The action is specified in a then statement

    C

    Ters are optional in a policy

    D

    The match condition can be identified with a from statement

    E

    Every policy must contain at least one term


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  • 第23题:

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    Which three statements about performance analysis by SQL Performance Analyzer are true? ()(Choose three.)
    A

    It detects changes in SQL execution plans.

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    It produces results that can be used to create the SQL plan baseline.

    C

    The importance of SQL statements is based on the size of the objects accessed.

    D

    It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.

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    It shows only the overall impact on workload and not the net SQL impact on workload.


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  • 第24题:

    多选题
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    A

    It has the same maximum hop count as version 1

    B

    It uses broadcasts for its routing updates

    C

    It is a classless routing protocol

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    It has a lower default administrative distance than RIP version 1

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    It supports authentication

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    解析: 暂无解析