Which of the following statements is true regarding implementing a Flashback Table recovery？（）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C

题目

Which of the following statements is true regarding implementing a Flashback Table recovery？（）

A、 An SCN is never used to perform a Flashback Table recovery.
B、 If a significant number of changes have been made to the table， row movement must be enabled.
C、 The tablespace must be offline before performing a Flashback Table recovery.
D、 Flashback Table recovery is completely dependent on the availability of undo data in the undo tablespace.

参考答案和解析

正确答案:D

更多“Which of the following statements is true regarding implementing a Flashback Table recovery？（）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C”相关问题

第1题

You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）A、Restore the backup control file and open the database with RESETLOGS option.B、Perform point-in-time recovery because flashback cannot be performed again on this tableC、Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D、Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

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第2题

You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEES table. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）A、perform point-in-time recoveryB、perform a Flashback Table operation to restore the table to the state it was in two days agoC、perform a Flashback Database operation to restore the database to the state it was in two days agoD、perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

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第3题

Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）； A、to undo the changes made to the EMP table since the specified timeB、to restore the EMP table that was wrongly dropped from the databaseC、to view the transactions that have modified the EMP table since the specified timeD、to view the changes made to the EMP table for one or more rows since the specified timeE、to recover the EMP table to a point in time in the past by restoring the most recent backup

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第4题

You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（）A、use the ROLLBACK command with SCN 663571B、perform Flashback Transaction Query with SCN 663571C、execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D、execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

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第5题

You work as a database administrator at Certkiller .com. You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEEStable. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）A、 perform point-in-time recoveryB、 perform a Flashback Table operation to restore the table to the state it was in two days agoC、 perform a Flashback Database operation to restore the database to the state it was in two days agoD、 perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

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第6题

By mistake， you ran the batch job （for updating the BILL_DETAILS table） twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify： a） A list of changes made along with the transaction identifier of each change. b） The necessary SQL statements to undo the erroneous changes. Which option would you choose？（）A、 RMAN only.B、 Flashback Table only.C、 Flashback Version Query only.D、 Flashback Database and Flashback Transaction Query.E、 Flashback Version Query and Flashback Transaction Query.

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第7题

You have just performed a FLASHBACK TABLE operation using the following command： flashback table employees to scn 123456； The employees table has triggers associated with it. Which of the following statements is true regarding the state of the triggers during the Flashback Table operation？（） A、 All the triggers are disabled.B、 All the triggers are enabled by default.C、 Enabled triggers remain enabled and disabled triggers remain disabled.D、 Triggers are deleted when a Flashback Table operation is performed.

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Which of the following statements is true regarding implementing a Flashback Table recovery？ （）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C

题目

参考答案和解析

更多“Which of the following statements is true regarding implementing a Flashback Table recovery？ （）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C”相关问题

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Which of the following statements is true regarding implementing a Flashback Table recovery？（）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C

更多“Which of the following statements is true regarding implementing a Flashback Table recovery？（）A、 An SCN is never used to perform a Flashback Table recovery.B、 If a significant number of changes have been made to the table， row movement must be enabled.C”相关问题