单选题The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each.One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file: ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3; Which action should you perform immediately after using this command?（）AYou should perform a log switchBYou should make a backup of the databaseCYou should switch the database to the NONARCHIVELOG modeDYou should shut down the database instance and perform a complete database recovery
单选题
The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each.One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file: ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3; Which action should you perform immediately after using this command?（）
A
You should perform a log switch
B
You should make a backup of the database
C
You should switch the database to the NONARCHIVELOG mode
D
You should shut down the database instance and perform a complete database recovery
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