Animportanttablespaceofyourdatabaseisdropped&ensAnimportanttablespaceofyourdatabaseisdroppedbymistake.YouusetheFlashbackDatabasefeaturetoretrievethetablespace.Youperformthefollowingstepstoretrievethetablespace：1.YoulogontoEnterpriseManagerasSYSDBA.2.Youse
题目
Animportanttablespaceofyourdatabaseisdropped&ens
Animportanttablespaceofyourdatabaseisdroppedbymistake.YouusetheFlashbackDatabasefeaturetoretrievethetablespace.Youperformthefollowingstepstoretrievethetablespace：
1.YoulogontoEnterpriseManagerasSYSDBA.
2.Youselectthemaintenancescreen.
3.YouchoosePerformRecoveryoptiononthemaintenancescreen.
4.YouchooseWholeDatabaseintheObjectTypedrop-downlistPerformRecovery：Typescreen.5.YouchooseRecovertoCurrentTimefromtheOperationTypeonthePerformRecovery：Typescreen.
6.YouprovidetheHostCredentialsforadatabaseuser.onthePerformRecovery：Typescreen.
7.Youclickthecontinuebutton.
Aninformationscreenappearssayingthatthedatabaseisunavailable.Whatisthisinformationscreen？（）