Which three are true regarding the use of outer joins? （）A、You cannot use IN operator in a condition that involves an outerjoin.B、You use (+) on both sides of the WHERE condition to perform an outerjoin.C、You use (*) on both sides of the WHERE condition t

题目

Which three are true regarding the use of outer joins? （）

  • A、You cannot use IN operator in a condition that involves an outerjoin.
  • B、You use (+) on both sides of the WHERE condition to perform an outerjoin.
  • C、You use (*) on both sides of the WHERE condition to perform an outerjoin.
  • D、You use an outerjoin to see only the rows that do not meet the join condition.
  • E、In the WHERE condition, you use (+) following the name of the column in the table without matching rows, to perform an outerjoin.
  • F、You cannot link a condition that is involved in an outerjoin to another condition by using the OR operator.
相似考题

1.If you don’t know exactly where to find the information, you may use one of the many search engines on the Web. ()此题为判断题(对，错)。

2.The EMP table contains these columns:You need to display the employees who have not been assigned to any department.You write the SELECT statement:What is true about this SQL statement?()A. The SQL statement displays the desired results.B. The column in the WHERE clause should be changed to display the desired results.C. The operator in the WHERE clause should be changed to display the desired results.D. The WHERE clause should be changed to use an outer join to display the desired results.

3.Describe an instance where you made effective use of facts to secure the agreement of others.

4.Which three are true regarding the use of outer joins? ()A. You cannot use IN operator in a condition that involves an outerjoin.B. You use (+) on both sides of the WHERE condition to perform an outerjoin.C. You use (*) on both sides of the WHERE condition to perform an outerjoin.D. You use an outerjoin to see only the rows that do not meet the join condition.E. In the WHERE condition, you use (+) following the name of the column in the table without matching rows, to perform an outerjoin.F. You cannot link a condition that is involved in an outerjoin to another condition by using the OR operator.

参考答案和解析
正确答案:D,E,F
更多“Which three are true regarding the use of outer joins? （）A、You cannot use IN operator in a condition that involves an outerjoin.B、You use (+) on both sides of the WHERE condition to perform an outerjoin.C、You use (*) on both sides of the WHERE condition t”相关问题

  • 第1题：

    In which three cases would you use the USING clause?()

    A.You want to create a nonequijoin.

    B.The tables to be joined have multiple NULL columns.

    C.The tables to be joined have columns of the same name and different data types.

    D.The tables to be joined have columns with the same name and compatible data types.

    E.You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.


    参考答案：C, D, E

  • 第2题：

    Write a letter of about 100 words to the president of your university,suggesting how to improve students’physical condition.You should include the details you think necessary.You should write neatly on the ANSWER SHEET.Do not sign your own name at the end of the letter.Use“Li Ming”instead.


    答案：
    解析：
    审题谋篇本篇应用文仍然属于书信类型中的建议信，从话题角度看属于健康类话题。该书信的收信人为大学校长，所以属于正式文体，文中不应出现过多缩写/省略/口语表达等非正式语言。称呼处可以直接尊称“Dear Mr.President,”，正文仍然按照三段模式展开。首段需要简单地自我介绍，交代写信目的。中间段具体对如何提高大学生身体素质给出2-3条可行的建议。建议信的尾段一般是提出希望，期待回信。落款使用常见的书信落款：Yours sincerely,Sincerely yours，Yours truly，或Truly yours等，签名应写Li Ming，切勿出现自己真实姓名。二、参考范文Dear Mr.President,I am a student of our university.I am writing this letter to bring forward some effective suggestions to our college students about how to improve their body health.Initially,exercising,though not a student’s first priority in his/her daily life,should be stressed by all of us as well as our university,because it is vital to not only our physical health but mental health as well.Furthermore,developing a regular and healthy diet,which provides vitamins and other nutrients to our body,would,to some extent,undoubtedly benefit our body.I hope that you will find my suggestions useful and propagandas be launched among the students.I am looking forward to your earlier response.Yours sincerely,Li Ming三、万能句型1.I am writing this letter to bring forward some effective suggestions to…about….2.…should be stressed by…,because it is vital to but…as well.3.I hope that you will find my suggestions useful.4.I am looking forward to your earlier response.

  • 第3题：

    Which statement is true about Kompella-based and Martina-based VPNs？（）

    • A、Both use LDP
    • B、Both use BGP
    • C、Both require additional hardware.
    • D、Both use a two-label stack for forwarding.

    正确答案:D

  • 第4题：

    Which three are true regarding the use of outer joins?（）

    • A、You cannot use IN operator in a condition that involves an outerjoin.
    • B、You use (+) on both sides of the WHERE condition to perform an outerjoin.
    • C、You use (*) on both sides of the WHERE condition to perform an outerjoin.
    • D、You use an outerjoin to see only the rows that do not meet the join condition.
    • E、In the WHERE condition, you use (+) following the name of the column in the table without matching rows, to perform an outerjoin.
    • F、You cannot link a condition that is involved in an outerjoin to another condition by using the OR operator.

    正确答案:D,E,F

  • 第5题：

    In which case would you use a FULL OUTER JOIN?（）

    • A、Both tables have NULL values.
    • B、You want all unmatched data from one table.
    • C、You want all matched data from both tables.
    • D、You want all unmatched data from both tables.
    • E、One of the tables has more data than the other.
    • F、You want all matched and unmatched data from only one table.

    正确答案:D

  • 第6题：

    Which two are true about aggregate functions? （）

    • A、You can use aggregate functions in any clause of a SELECT statement.
    • B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.
    • C、You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
    • D、You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
    • E、You can use aggregate functions on a table, only by grouping the whole table as one single group.
    • F、You cannot group the rows of a table by more than one column while using aggregate functions.

    正确答案:A,D

  • 第7题：

    You have lost all your database control files. To recover them， you are going to use the results of the alter database backup controlfile to trace command. Your datafiles and your online redo logs are all intact.  Which of the following is true regarding your recovery？（）  

    • A、 You will need to open the database with the resetlogs command.
    • B、 All you need to do is execute the trace file from SQL*Plus and it will perform the recovery for you.
    • C、 You will use the resetlogs version of the create controlfile command.
    • D、 You will use the noresetlogs version of the create controlfile command.
    • E、 You will use the trace file to create a backup control file， and then you will recover the database with the recover database using backup controlfile command

    正确答案:D

  • 第8题：

    You want to perform a backup of your database to tape. Which backup format can you use？（）

    • A、backup set only
    • B、image copy only
    • C、only user-managed backup
    • D、both image copy and backup set
    • E、only incremental image copy backup

    正确答案:A

  • 第9题：

    You create Windows Forms applications by using the .NET Framework 3.5. You plan to use a setup project to deploy a new Windows Forms application.The application uses a component that requires the Microsoft NET Framework 1.1.You need to create a launch condition so that the application can be deployed on client computers.   What should you do？（）

    • A、Use the Depth property.
    • B、Use the Version property.
    • C、Use the MinVersion property.
    • D、Use the ComponentID property.

    正确答案:B

  • 第10题：

    单选题
    The term restricted visibility，when used in the Rules，refers to（）.
    A

    situations when you can see vessels on radar that you cannot see visually

    B

    visibility of less than half a mile

    C

    any condition where visibility is restricted

    D

    visibility where you cannot see shore


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    In which three cases would you use the USING clause?（）
    A

    You want to create a nonequijoin.

    B

    The tables to be joined have multiple NULL columns.

    C

    The tables to be joined have columns of the same name and different data types.

    D

    The tables to be joined have columns with the same name and compatible data types.

    E

    You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.


    正确答案： C,B
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following is NOT true according to the article?
    A

    Parents play an important part in their children’s growth.

    B

    The less you use your mind the duller you may become.

    C

    Intelligence is obviously the result of where and how you live.

    D

    Parents should always encourage their children.


    正确答案： C
    解析：
    态度题。A选项“父母在孩子的成长过程中扮演一个重要的角色”正确；B选项“脑子用得越少，越容易变得迟钝”并没有在原文中提到；C选项“很显然，智力是一个人生活环境和生活方式的影响结果”，而根据原文，智力是先天和后天培养的综合结果，显然，C选项中的观点错误；D选项“父母应该时刻鼓励孩子”是作者在文中积极倡导的。

  • 第13题：

    You are planning to anchor in an area where several anchors have been lost due to fouling．As a precaution，you should ______．

    A.anchor using both anchors

    B.anchor with scope of 8 or more to 1

    C.use a stern anchor

    D.fit a crown strap and work wire to the anchor


    正确答案：D

  • 第14题：

    --Which of those electronic dictionaries do you like most?
    -- __________. They are both expensive and of little use.

    A.None
    B.Neither
    C.All
    D.Both

    答案：A
    解析：
    考查不定代词。both表示“两者都”，用于肯定句中；neither表示“两者都不”，用于否定句中；all指“三者或三者以上都”，用于肯定句中；none指“三者或三者以上都不”，用于否定句中。由后一句“They are both expensive and of little use．”可知答案应为表示否定的代词，故排除C、D。由首旬中的most可知是在三个以上之间选择。故选A。

  • 第15题：

    Regarding zone types， which statement is true？（）

    • A、You cannot assign an interface to a functional zone.
    • B、You can specifiy a functional zone in a security policy.
    • C、Security zones must have a scheduler applied.
    • D、You can use a security zone for traffic destined for the device itself.

    正确答案:D

  • 第16题：

    Which two statements are true about interoperating with Oracle AQ JMS with Oracle WebLogic server ？（）

    • A、 If you select a non-XA JDBC driver， you can use WebLogic AQ JMS in both local & global transactions
    • B、 Oracle WebLogic Server requires a JDBC driver to communicate with the Oracle AQ JMS
    • C、 Oracle WebLogic AQ JMS stand-alone client automatically participate in global transactions managed by Oracle WebLogic Server
    • D、 If you select an XA JDBC driver， you can use WebLogic AQ JMS in both local and global transactions

    正确答案:B,D

  • 第17题：

    You want to create a WebLogic domain in a production environment. Which three actions should  you perform?（）

    • A、Use a multinode WebLogic domain.
    • B、Use a single-node WebLogic domain. 
    • C、Use clusters.  
    • D、Refrain from using clusters.  
    • E、Install WeLogic in production mode with CA signed certificates.

    正确答案:A,C,E

  • 第18题：

    Which two statements are correct regarding the Flashback Versions Query feature？（）

    • A、 You can use this feature to identify the committed versions of the rows， but not the uncommitted versions.
    • B、 You can use this feature to identify the versions of V$ views.
    • C、 You can use this feature to identify the inserts， deletes， and updates performed on a particular row but not the data definition language （DDL） operations performed on the table.
    • D、 You can use this feature for a table only if row movement is enabled for the table.
    • E、 You can use this feature to identify the versions of external and fixed tables.

    正确答案:A,C

  • 第19题：

    You are implementing a very simple TCP/IP network. It rarely changes and you would like to use Oracle Connection Manager to filter client requests.  Which naming method can you use？（）

    • A、Only host
    • B、Only local
    • C、Either host or local
    • D、Both host and local

    正确答案:A

  • 第20题：

    You have three computers that run Windows 7. You use Windows PowerShell to perform remote administration tasks on all three computers. You need to remotely administer all three  computers by usingPowerShell.  Which PowerShell cmdlet should you use?（）

    • A、Enable-PSRemoting
    • B、Enable-PSSessionConfiguration
    • C、New-PSDrive
    • D、New-PSSession

    正确答案:D

  • 第21题：

    多选题
    Which three are true regarding the use of outer joins? （）
    A

    You cannot use IN operator in a condition that involves an outerjoin.

    B

    You use (+) on both sides of the WHERE condition to perform an outerjoin.

    C

    You use (*) on both sides of the WHERE condition to perform an outerjoin.

    D

    You use an outerjoin to see only the rows that do not meet the join condition.

    E

    In the WHERE condition, you use (+) following the name of the column in the table without matching rows, to perform an outerjoin.

    F

    You cannot link a condition that is involved in an outerjoin to another condition by using the OR operator.


    正确答案： D,E,F
    解析： 暂无解析

  • 第22题：

    多选题
    Which two statements are true about interoperating with Oracle AQ JMS with Oracle WebLogic server ？（）
    A

    If you select a non-XA JDBC driver， you can use WebLogic AQ JMS in both local & global transactions

    B

    Oracle WebLogic Server requires a JDBC driver to communicate with the Oracle AQ JMS

    C

    Oracle WebLogic AQ JMS stand-alone client automatically participate in global transactions managed by Oracle WebLogic Server

    D

    If you select an XA JDBC driver， you can use WebLogic AQ JMS in both local and global transactions


    正确答案： D,B
    解析： 暂无解析

  • 第23题：

    单选题
    You have three computers that run Windows 7. You use Windows PowerShell to perform remote administration tasks on all three computers. You need to remotely administer all three  computers by usingPowerShell.  Which PowerShell cmdlet should you use?（）
    A

    Enable-PSRemoting

    B

    Enable-PSSessionConfiguration

    C

    New-PSDrive

    D

    New-PSSession


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    You have lost all your database control files. To recover them， you are going to use the results of the alter database backup controlfile to trace command. Your datafiles and your online redo logs are all intact.  Which of the following is true regarding your recovery？（）
    A

     You will need to open the database with the resetlogs command.

    B

     All you need to do is execute the trace file from SQL*Plus and it will perform the recovery for you.

    C

     You will use the resetlogs version of the create controlfile command.

    D

     You will use the noresetlogs version of the create controlfile command.

    E

     You will use the trace file to create a backup control file， and then you will recover the database with the recover database using backup controlfile command


    正确答案： E
    解析： 暂无解析

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