Which of the following statements eliminates all but one of

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

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相似问题和答案

第1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


参考答案:B

第2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3题:

Which one of the following is not an acquisition method?

A advertising

B invitation

C negotiation

D purchase

E all are acquisition methods


正确答案:A

第4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5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6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


参考答案:B

第7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8题:

Which of the following statements is true? Accounts payable are ______.

A.debts owed to suppliers

B.related to purchases of goods on an open account

C.current liabilities

D.all of the above


正确答案:D
解析:文章第三段提到Accounts payable are debts...on an open account.本题是关于应付账款的表述,应付账款是企业欠供应商的债务,是由于购买商品时进行赊销而形成的应付账款,应付账款属于短期流动债务。

第9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10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

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