单选题

Your production database is running in archivelog mode. You use RMAN with a recovery catalog to back up your database to media and the database is uniquely identified in the recovery catalog. You want to create a test database from the production database and allow the production database to remain open during the duplicate process. You restore the database backups to a new host with the same directory structure as the production database and want to use the recovery catalog for future backups after the database is successfully restored to the new host. How would you achieve this?

A、

by using the RMAN switch command to set the new location for the data files

B、

by using the RMAN duplicate command with nofilenamecheck to recover the database to the new hostRMAN duplicate nofilenamecheck

C、

by using the RMAN duplicate command with dbid and set new name for tablespace to recover the database to the new host

D、

by creating a new database in the new host, and then using the RMAN recover command

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A、Create SQL plan directives for each of the regressed statements.
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单选题 You plan to create a database by using the Database Configuration Assistant (DBCA., with the following specifications:
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单选题 You enable Flashback Data Archive for a table for which you want to track and save all transactions for four years. After some time, the requirement changes for keeping transactions from four to two years.You execute the following command to change the requirement:SQL> ALTER FLASHBACK ARCHIVE fdal MODIFY RETENTION 2 YEAR;What is the outcome?

A、All historical data older than two years, if any, is purged from the flashback archive FDA1.
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单选题 A user complains about poor database performance.You want to verify if the user’s session has waited for certain types of I/O activity. Which view displays all waits waited on by a session at least once?

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单选题 Examine the statements that use flashback technologies:

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2.SELECT * FROM customers AS OF SCN 123456;

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C、The target database control file is synchronized from the recovery catalog with a full resync at the next backup.
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