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A user performs an update on a table. Shortly after committi

题目
单选题
A user performs an update on a table. Shortly after committing the transaction， they realize that they had an error in their WHERE clause causing the wrong rows to be updated. Which Flashback option would allow you to undo this transaction and restore the table to its previous state？（）
A

 Flashback Drop

B

 Flashback Query

C

 Flashback Versions Query

D

 Flashback Transaction Query

E

 Flashback Table

参考答案和解析
正确答案： B
解析： 暂无解析
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相似问题和答案

第1题：

（ 35 ） “ 把查询 sc 表和更新 sc 表的 grade 列的权限授予用户 user1 ” 的正确 SQL 语句是

A ） GRANT SELECT ， UPDATE （ grade ） ON TABLE sc TO user1

B ） GRANT SELECT sc ， UPDATE sc . grade TO user1

C ） GRANT SELECT ， UPDATE ON TABLE sc . grade TO user1

D ） GRANT SELECT ON TABLE sc ， UPDATE ON TABLE sc(grade) TO user1


正确答案：A

第2题：

Kerberos is a form of user authentication that:()

A. Provides users access to network resources.

B. Performs router commands after user authentication.

C. Provides users with remote access only capabilities.

D. Does not require an authentication server


参考答案：A

第3题：

He died _________ the earthquake.

A. shortly as

B. shortly after

C. shortly while

D. short after


参考答案：B

第4题：

Kerberos is a form of user authentication that:（）

  • A、Provides users access to network resources.
  • B、Performs router commands after user authentication.
  • C、Provides users with remote access only capabilities.
  • D、Does not require an authentication server

正确答案:A

第5题：

更改oracle用户HR，使其变为不可用（锁定）状态（）

  • A、UPDATE  USER  HR  ACCOUNT  DISABLE
  • B、UPDATE  USER  HR  ACCOUNT  LOCK
  • C、ALTER USER  HR  ACCOUNT  DISABLE
  • D、ALTER USER  HR  ACCOUNT  LOCK

正确答案:D

第6题：

Which of the following is enabled in the BIOS that will prompt a user to enter their password every time the laptop performs a POST?()

A. Power User access

B. Power on password

C. Administrative password

D. User profile access


参考答案：B

第7题：

Shortly after the accident, two___________ police were sent to the spot to keep order.

A.dozens of
B.dozens
C.dozen of
D.dozen

答案：D
解析：
此题题干中的空前有数词two修饰，dozen不能加S，其后也不能加of，故选D。译为事故发生后不久，有二十四个警察被派往现场维持秩序。

第8题：

Shortly after the accident, Terry Lapham was _____ from his post as project manager.

A.dismissed

B.discussed

C.disappeared

D.discovered


参考答案：A

第9题：

Which of the following is enabled in the BIOS that will prompt a user to enter their password every time the laptop performs a POST?（）

  • A、Power User access
  • B、Power on password
  • C、Administrative password
  • D、User profile access

正确答案:B

第10题：

Shortly after the Press Ctrl-Alt-Delete to login screen appears in Windows XP， a user gets the error One or more services failed to start. Which of the following locations could be accessed to identify the service that did not start and attempt to start the service manually？（）

  • A、Computer Management
  • B、Services MMC Plug-in
  • C、Event Log
  • D、Task Manager
  • E、System Configuration Utility

正确答案:A,B

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