多项选择题
A. shut down and restart the instance
B. add new tempfiles to the temporary tablespaces after recovery
C. perform a media recovery and open the database with the RESETLOGS option
D. perform a media recovery and bring the database to NOARCHIVELOG mode
单项选择题 Your database operates in ARCHIVELOGmode. The redo log files are not multiplexed and one of the online redo logs is missing. The missing redo log sequence， 230， is not archived and it contained information from 10：35 a.m. onwards. The current time is 11：00 a.m. Because of a disk crash， you executed the following command to perform an incomplete recovery： RMAN> RUN { 2> SET UNTIL SEQUENCE 230 THREAD 1； 3> ALTER DATABASE MOUNT； 4> RESTORE DATABASE； 5> RECOVER DATABASE； 6> ALTER DATABASE OPEN RESETLOGS； 7> }； With reference to this scenario， which statement is true？（）
单项选择题 YouexecutedthefollowingcommandinRecoveryManager（RMAN）againstyourOracle10gdatabase：RMAN>REPORTNEEDBACKUPdays3；Whatwouldbetheoutputofthiscommand？（）
单项选择题 Youhavespecifiedthewarningandcriticalthresholdvaluesofanapplicationtablespacetobe60%and70%respectively.Fromthetablespacespaceusagemetrics，youfindthattheactualspaceusagehasreachedthespecifiedwarningthresholdvalue，butnoalertshavebeengenerated.Whatcouldbethereasonforthis？（）