单选题Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?（）A SELECT UNIQUE dept FROM staffB SELECT DISTINCT dept FROM staffC SELECT (dept) UNIQUE FROM staffD SELECT (dept) DISTINCT FRO

题目
单选题
Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?（）
A

SELECT UNIQUE dept FROM staff

B

SELECT DISTINCT dept FROM staff

C

SELECT (dept) UNIQUE FROM staff

D

SELECT (dept) DISTINCT FROM staff

相似考题

1.Which one of the following is not an acquisition method?A advertisingB invitationC negotiationD purchaseE all are acquisition methods

2.Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?()A.SELECT UNIQUE dept FROM staffB.SELECT DISTINCT dept FROM staffC.SELECT (dept) UNIQUE FROM staffD.SELECT (dept) DISTINCT FROM staff

3.Which of the following statements is used to revoke all DML privileges on table EMPLOYEE from user TOM?()A.REVOKE ALL PRIVILEGES FROM USER tomB.REVOKE ALL ON EMPLOYEE FROM USER tomC.REVOKE EXECUTE ON EMPLOYEE FROM USER tomD.REVOKE PRIVILEGES ON EMPLOYEE FROM USER tom

4.Which of the following statements is true? Accounts payable are ______.A．debts owed to suppliersB．related to purchases of goods on an open accountC．current liabilitiesD．all of the above

更多“Which of the following statements eliminates all but one of”相关问题

  • 第1题：

    Which of the following options is NOT one of the Key Objectives of NSN Smart Labs?()

    A.Should benefit all involved companies.

    B.Attract public interest.

    C.Invite Competition.

    D.Open for all developers and all operators.


    参考答案：C

  • 第2题：

    which one of the following statements would lee include in an agent to limit the documents processed by the agent to those for which the value of the type field is "action"? （）

    • A、FIELD Type :="action"     
    • B、SELECT Type ="action" 
    • C、SELECT Type :="action "      
    • D、@if (type="action";@success;@failure) 

    正确答案:B

  • 第3题：

    Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command：   RESTORE CONTROLFILE FROM AUTOBACKUP；   Which of the following statements is true？（） 

    • A、 The command restores only the missing control file.
    • B、 The command restores all the control files.
    • C、 The command fails because the database is running.
    • D、 This is the correct way to address this problem.
    • E、 This is not the correct way to address this problem.

    正确答案:C,E

  • 第4题：

    Which of the following statements is false？（）

    • A、There can be more than one master catalog for a store
    • B、A sales catalog is a subset of the master catalog
    • C、The master catalog is the central place for the stores merchandise
    • D、There can be more than one sales catalog for a store
    • E、Multiple stores can share a master catalog

    正确答案:A

  • 第5题：

    Which one of the following @Function to all "response"and "response to response"documents of parent documents?（）

    • A、@Responses      
    • B、@AllChildren    
    • C、@AllResponses  
    • D、@AllDescendants 

    正确答案:D

  • 第6题：

    Which one of the following BEST describes Long Term File System (LTFS)?（）

    • A、eliminates dependence of middleware layer 
    • B、provides the ability to partition the library 
    • C、makes tape look and work like any removable media 
    • D、provides up to 48% lower power consumption in idle mode

    正确答案:C

  • 第7题：

    多选题
    Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
    A

    c=d

    B

    l and k are parallel

    C

    m and l are perpendicular


    正确答案： C,B
    解析：
    根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

  • 第8题：

    多选题
    Which of the following statements are true? (Indicate all such statements.)
    A

    τ(5) =τ(7)

    B

    τ(5) τ(7) =τ(35)

    C

    τ(5) + τ(7) =τ(12)


    正确答案： A,B
    解析：
    5和7均只有两个正除数，因此根据题干信息，A项正确；35有四个正除数，所以B项也是正确的；12有6个正除数，因此C项错误；选择A、B两项。

  • 第9题：

    多选题
    For Question 1, consider each of the choices separately and select all that apply.　 Which of the following statements about Edison can be inferred from the passage?
    A

    Edison was one of the world’s most esteemed and influential inventors.

    B

    Concrete furniture was the only one of Edison’s inventions to ultimately fail.

    C

    The light bulb and the phonograph were extremely successful inventions by Edison.


    正确答案： A,B
    解析：
    文段中提到，Thomas Edison was “one of the world’s most prestigious inventors”，因此，A项正确；文段中提到concrete furniture 是爱迪生的一项失败的发明，但并没有说明它是爱迪生唯一一项失败的发明，因此，B不正确；C项也是正确的，因为文章举例说明了爱迪生在世界上富有威望的原因，正是因为他发明了light bulb以及phonograph。

  • 第10题：

    单选题
    Which of the following statements is not true?
    A

    Henry Ford influenced our lives.

    B

    Henry Ford influenced historians.

    C

    Henry Ford influenced all manufacturing.


    正确答案： A
    解析：
    选项A和C分别于第一段前两句相对应。选项B在文中并未提及。

  • 第11题：

    单选题
    The author cites the dog as an example of artificial selection because of all the following statements EXCEPT that ______.
    A

    Dogs are domestic animals

    B

    The dog is one of nature’s survivors

    C

    Breeders register dogs to obtain a pedigree

    D

    Humans have been the primary agents in dog evolution


    正确答案： B
    解析：
    根据文章内容可知人工选择会栽培植物、驯化动物，并且第三段末句指出通过人工选择人们充当了agents of evolution。可见人们对狗进行人工选择时也符合这两方面内容，因此A、D项正确。C项内容在末段提及。由于狗是人工选择的结果，因此就不可能是自然选择的幸存者，故B项表述有误。

  • 第12题：

    单选题
    Only one of the following statements is true, according to what was said. Which one is it?
    A

    The approaches of the three researchers are quite different.

    B

    The three researchers’ approaches are all based on detecting imperfections in the print quality of documents.

    C

    Old-school forensic scientists were unable to trace documents to particular typewriters based on quirks of the individual keys.

    D

    The researchers from Purdue believe the perfect pieces of engineering leave unique patterns of banding in their products.


    正确答案： A
    解析：
    录音首句便指出虽然三位研究人员所采取的方法有稍微的不同，但是“all are based on detecting imperfections in the print quality of documents”，因此选项B与录音内容相符。
    【录音原文】
    Though the approaches of the three researchers differ slightly, all are based on detecting imperfections in the print quality of documents. Old-school forensic scientists were—at least so the movies would have you believe—able to trace documents to particular typewriters based on quirks of the individual keys. The researchers from Purdue employ a similar approach, exploiting the fact that the rotating drums and mirrors inside a printer are imperfect pieces of engineering which leave unique patterns of banding in their products.

  • 第13题：

    For the following statements， which one is perceived as a drawback of implementing Fibre ChannelAuthentication Protocol （FCAP）？（）

    • A、It is restricted in size to only three segments
    • B、It requires the use of netBT as the network protocol
    • C、It requires the implementation of IKE
    • D、It relies on an underlying Public Key Infrastructure

    正确答案:D

  • 第14题：

    which one of the following best where layer can be used?（）

    • A、form 
    • B、page 
    • C、subform 
    • D、all of the above

    正确答案:B

  • 第15题：

    Several @functions can execute multiple statements. Which one of the following initializes a variable and can increment in during the operation?（）

    • A、 @do 
    • B、 @for 
    • C、 @while 
    • D、 @dowhile 

    正确答案:B

  • 第16题：

    Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?（）

    • A、SELECT UNIQUE dept FROM staff
    • B、SELECT DISTINCT dept FROM staff
    • C、SELECT (dept) UNIQUE FROM staff
    • D、SELECT (dept) DISTINCT FROM staff

    正确答案:B

  • 第17题：

    Which of the following statements is used to revoke all DML privileges on table EMPLOYEE from user TOM?（）

    • A、REVOKE ALL PRIVILEGES FROM USER tom
    • B、REVOKE ALL ON EMPLOYEE FROM USER tom
    • C、REVOKE EXECUTE ON EMPLOYEE FROM USER tom
    • D、REVOKE PRIVILEGES ON EMPLOYEE FROM USER tom

    正确答案:B

  • 第18题：

    多选题
    If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
    A

    p + q is even

    B

    pq is odd

    C

    p2-q2 is even


    正确答案： A,B
    解析：
    由于所有大于2的质数都是奇数，因此p和q均是奇数，两奇数相加为偶数，所以A项正确；两奇数的乘积还是奇数，所以B项正确；两奇数的平方还各自是奇数，而两奇数的平方之差是偶数，因此C项也正确；所以选择A、B、C三项。

  • 第19题：

    多选题
    Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command：   RESTORE CONTROLFILE FROM AUTOBACKUP；   Which of the following statements is true？（）
    A

    The command restores only the missing control file.

    B

    The command restores all the control files.

    C

    The command fails because the database is running.

    D

    This is the correct way to address this problem.

    E

    This is not the correct way to address this problem.


    正确答案： C,E
    解析： 暂无解析

  • 第20题：

    单选题
    Several @functions can execute multiple statements. Which one of the following initializes a variable and can increment in during the operation?（）
    A

     @do 

    B

     @for 

    C

     @while 

    D

     @dowhile 


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    For the following statements， which one is the strongest symmetrical encryption algorithm？（）
    A

    AES

    B

    3DES

    C

    DES

    D

    Diffie-Hellman


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following options is NOT one of the Key Objectives of NSN Smart Labs?（）
    A

    Should benefit all involved companies.

    B

    Attract public interest. 

    C

    Invite Competition.

    D

    Open for all developers and all operators.


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    which one of the following statements would lee include in an agent to limit the documents processed by the agent to those for which the value of the type field is "action"? （）
    A

    FIELD Type :=action     

    B

    SELECT Type =action 

    C

    SELECT Type :=action       

    D

    @if (type=action;@success;@failure) 


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    Which of the following statements is INCORRECT?
    A

    Generally speaking, almost all of the clerks get along well with their colleagues.

    B

    It’s impossible to oppress one’s bad temper while being passionate on one’s work.

    C

    People tend to get angry at work in many situations.

    D

    People in companies welcome rage.


    正确答案： A
    解析：
    事实细节题. 文中提到“A Gallup poll…one in five office workers has been so furious with a colleague…”A选项与原文意思不符，所以选A。

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