What is necessary for your query on an existing view to execute successfully?（）A、The underlying tables must have data.B、You need SELECT privileges on the view.C、The underlying tables must be in the same schema.D、You need SELECT privileges only on the unde

题目

What is necessary for your query on an existing view to execute successfully?（）

  • A、The underlying tables must have data.
  • B、You need SELECT privileges on the view.
  • C、The underlying tables must be in the same schema.
  • D、You need SELECT privileges only on the underlying tables.
相似考题

1.－I’d like to know what insurance you will cover for your clients. － ():AInsurance is necessary for our clients. ;BI suggest a _Free of Particular Average Policy._ ;CSure, but there is an extra premium for the buyer’s account.

2.What is necessary for your query on an existing view to execute successfully? ()A. The underlying tables must have data.B. You need SELECT privileges on the view.C. The underlying tables must be in the same schema.D. You need SELECT privileges only on the underlying tables.

3.Examine the data from the ORDERS and CUSTOMERS tables.Evaluate the SQL statement:What is the result when the query is executed?()A.B.C.D. The query fails because the subquery returns more than one row.E. The query fails because the outer query and the inner query are using different tables.

4.If you are the observer about the class, before the observation, what should you do except________________.A.describe what you’ll be doing during the observationB.schedule a meeting to discuss the observationC.clarify the purpose of the observationD.it’is not necessary to meet with your colleague or TA to discuss

参考答案和解析
正确答案:B
更多“What is necessary for your query”相关问题

  • 第1题：

    下面哪些句子可以表示"您贵姓?"()

    A、What's your last name?

    B、What's your family name?

    C、What's your name?

    D、What's your first name?


    参考答案：AB

  • 第2题：

    A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing? ______.

    A.Shift weight to the bow

    B.Shift weight to the center of the boat

    C.Shift weight to the stern

    D.Throw excess weight overboard


    正确答案：C

  • 第3题：

    what device sends IGMP Query messages？


    正确答案:If using IGMP v1， DR selected via multicast routing protocol will send IGMP query message. If using IGMP v2，querier selected using IGMP query messages will send IGMP query messages. IGMP Query messages are sent by routers. If more than one router is attached to the subnet， the router with the lowest IP address is the querier.

  • 第4题：

    You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）

    • A、 You must use automatic undo management in the database.
    • B、 You must configure OMF in your database.
    • C、 You must configure ASM for storing the datafiles.
    • D、 You must multiplex the online redo log file.

    正确答案:A

  • 第5题：

    You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）

    • A、 The time when the last flashback operation in your database was performed.
    • B、 The time when the first flashback operation in your database was performed.
    • C、 A list of flashback operations performed in your database using SCN and time.
    • D、 The approximate time and the lowest system change number （SCN） to which you can flash back your database.

    正确答案:D

  • 第6题：

    What is true regarding subqueries?（）

    • A、The inner query always sorts the results of the outer query.
    • B、The outer query always sorts the results of the inner query.
    • C、The outer query must return a value to the inner query.
    • D、The inner query returns a value to the outer query.
    • E、The inner query must always return a value or the outer query will give an error.

    正确答案:D

  • 第7题：

    问答题
    what device sends IGMP Query messages？

    正确答案： If using IGMP v1， DR selected via multicast routing protocol will send IGMP query message. If using IGMP v2，querier selected using IGMP query messages will send IGMP query messages. IGMP Query messages are sent by routers. If more than one router is attached to the subnet， the router with the lowest IP address is the querier.
    解析： 暂无解析

  • 第8题：

    单选题
    What is true regarding subqueries?（）
    A

    The inner query always sorts the results of the outer query

    B

    The outer query always sorts the results of the inner query

    C

    The outer query must return a value to the outer query

    D

    The inner query returns a value to the outer query

    E

    The inner query must always return a value or the outer query will give an error


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）
    A

     The time when the last flashback operation in your database was performed.

    B

     The time when the first flashback operation in your database was performed.

    C

     A list of flashback operations performed in your database using SCN and time.

    D

     The approximate time and the lowest system change number （SCN） to which you can flash back your database.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    You are creating an online catalog application that will display product information on the company Web site. The product data is stored in a SQL Server 2005 database. The data is stored as relational data but must be passed to the application as an XML document by using FOR XML. You test your application and notice that not all of the items matching your query appear in the XML document. Only those products that have values for all elements in the schema appear.   You need to modify your Transact-SQL statement so that all products matching your query appear in the XML document. What should you do？（）
    A

    Add an XML index to the table that contains the product data.

    B

    Add the XSINIL argument to the ELEMENTS directive in the query.

    C

    Add a HAVING clause to the query.

    D

    Add the replace value of clause to the query.


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）
    A

    Shift weight to the bow

    B

    Shift weight to the center of the boat

    C

    Shift weight to the stern

    D

    Throw excess weight overboard


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    What is true regarding subqueries?（）
    A

    The inner query always sorts the results of the outer query.

    B

    The outer query always sorts the results of the inner query.

    C

    The outer query must return a value to the inner query.

    D

    The inner query returns a value to the outer query.

    E

    The inner query must always return a value or the outer query will give an error.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    If there were only one question left ,what would it most probably be?

    A.What was your childhood dream?

    B.What is your biggest achievement?

    C.What is your parents view of you?

    D.What was your handest expenrience in the war?


    正确答案：B

  • 第14题：

    During the period of your employment，if an area is designated as a war zone，you will，whilst in this area，receive such allowance ______．

    A.as may be decided upon by the Company

    B.as decided upon by yourself

    C.as necessary to cover all your expenses

    D.as necessary to cover the expenses for your repatriation your home port


    正确答案：A

  • 第15题：

    What is true regarding subqueries?（）

    • A、The inner query always sorts the results of the outer query
    • B、The outer query always sorts the results of the inner query
    • C、The outer query must return a value to the outer query
    • D、The inner query returns a value to the outer query
    • E、The inner query must always return a value or the outer query will give an error

    正确答案:D

  • 第16题：

    In your database， the STATISTICS_LEVEL initialization parameter is set to BASIC.  What is the impact of this setting？（）

    • A、The optimizer statistics are collected automatically.
    • B、Only the timed operating system （OS） statistics and plan execution statistics are collected.
    • C、The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
    • D、The snapshots for the Automatic Workload Repository （AWR） are not generated automatically. 
    • E、Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.

    正确答案:D

  • 第17题：

    You executed the following query in your database：  FROM V$FLASHBACK_DATABASE_LOG;  What would you determine from the output？（）

    • A、the time when the last flashback operation in your database was performed
    • B、the time when the first flashback operation in your database was performed
    • C、a list of flashback operations performed in your database using SCN and time
    • D、the approximate time and the lowest system change number （SCN） to which you can flash back your database

    正确答案:D

  • 第18题：

    问答题
    ◆Topic 8: Is education Losing its Value?　　Questions for reference:　　1. Some people think that this increased access to education is devaluing degrees. What’s your point of view?　　2. What can the degrees bring to people?　　3. Do you think it’s necessary to have increased emphasis on degrees in our society? Why?

    正确答案： 【参考答案】
    People have several arguments against the need for degrees. They say that having so many graduates devalues a degree. People lose respect for the degree holder. It is also claimed that education has become a rat race. Graduates have to compete for jobs even after years of studying.
    Another point is that studying for such a long time leads to. learners becoming inflexible. They know a lot about one narrow subject, but are unable to apply their skills. Employers prefer more flexible and adaptable workers.
    However, I feel strongly that this move to having more qualifications is a positive development.
    In the past education was only for the rich and powerful. Now it is available to everyone, and this will have many advantages for the country and the individual. First of all, it is impossible to be overeducated. The more people are educated, the better the world will be, because people will be able to discuss and exchange ideas. A further point is that people with degrees have many more opportunities. They can take a wider variety of jobs and do what they enjoy doing, instead of being forced to take a job they dislike. Finally, a highly educated workforce is good for the economy of the country. It attracts foreign investment.
    In conclusion, although there are undoubtedly some problems with increased levels of education, I feel strongly that the country can only progress if all its people are educated to the maximum of their ability.
    解析： 暂无解析

  • 第19题：

    单选题
    You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）
    A

     You must use automatic undo management in the database.

    B

     You must configure OMF in your database.

    C

     You must configure ASM for storing the datafiles.

    D

     You must multiplex the online redo log file.


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    You received complaints about the degradation of SQL query performance. You identified top SQL queries that consume time. What would be your next step to find out recommendations about statistics collection and restructuring of the SQL statement to improve query performance？（）
    A

    run Segment Advisor

    B

    run SQL Tuning Advisor on top SQL statements

    C

    run the Automatic Workload Repository （AWR） report

    D

    run the Automatic Database Diagnostic Monitor （ADDM）on top SQL statements


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    What is necessary for your query on an existing view to execute successfully?（）
    A

    The underlying tables must have data.

    B

    You need SELECT privileges on the view.

    C

    The underlying tables must be in the same schema.

    D

    You need SELECT privileges only on the underlying tables.


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    In your database，the STATISTICS_LEVEL initialization parameter is set to BASIC. What is the impact of this setting？（）
    A

    The optimizer statistics are collected automatically.

    B

    Only the timed operating system （OS） statistics and plan execution statistics are collected.

    C

    The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.

    D

    The snapshots for the Automatic Workload Repository （AWR） are not generated automatically. 

    E

    Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    You executed the following query in your database：  FROM V$FLASHBACK_DATABASE_LOG;  What would you determine from the output？（）
    A

    the time when the last flashback operation in your database was performed

    B

    the time when the first flashback operation in your database was performed

    C

    a list of flashback operations performed in your database using SCN and time

    D

    the approximate time and the lowest system change number （SCN） to which you can flash back your database


    正确答案： A
    解析： 暂无解析

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