单项选择题
You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（）
A. The time when the last flashback operation in your database was performed.
B. The time when the first flashback operation in your database was performed.
C. A list of flashback operations performed in your database using SCN and time.
D. The approximate time and the lowest system change number （SCN） to which you can flash back your database.
相关考题
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单项选择题
YoudatabaseoperatesinARCHIVELOGmodeanduser-managedconsistentbackupsareperformedeverySundaynight.OnTuesday，at9：00a.m.thecurrentlogsequencenumberwas369.Also，onTuesdayyoulostthedatafilebelongingtotheSYSTEMtablespaceandanachivelogfile（sequencenumber356）thatcontainedredoentriesbetween8：00a.m.and8.30a.m.Withreferencetothisscenario，whatwouldyoudotorecoverthedatabase？（）
A. Restore all the data files from last Sunday’s backup， and then perform a time-based recovery.
B. Restore all the data files from last Sunday’s backup， and then perform a cancel-based recovery.
C. Restore all the data files from last Sunday’s backup， and then perform a change-based recovery.
D. Restore only data files that belong to the SYSTEM tablespace from last Sunday’s backup， and then perform a complete recovery. -
多项选择题
Youlostadatafilethatbelongstoanindextablespaceinyourdatabase，whichoperatesinARCHIVELOGmode.Lossofthedatafileresultedinincreasedresponsetimeonyourqueries.Whichtwooptionswouldyouusetosolvethisproblem？（）
A. Restore the lost data file from the backup， and then flash back the database.
B. Restore the data file pertaining to index tablespace， and then recover the tablespace.
C. Restore all the data files， and then perform an incomplete recovery to get the tablespace back.
D. Restore all the data files， and then perform an incomplete recovery using the backup control file.
E. Drop and re-create the index tablespace， and then re-create all of the indexes in that tablespace. -
多项选择题
Users in your production database complain that they are getting the following error message while trying to insert rows into the ORDERS table： ERROR at line 1： ORA-01654： unable to extend index USERS.ORDERS_IND by 8 in tablespace INDEXES.While investigating， you find that the INDEXES tablespace has run out of space and there is no more free space on the disk where the data files are available. Which two actions could you perform to overcome this error without affecting the queries that are currently being executed？（）
A. Drop and re-create the inbox.
B. Coalesce the ORDERS_IND index.
C. Coalesce the INDEXES tablespace.
D. Drop and re-create the ORDERS table.
E. Rebuild the index online and move it to another tablespace.
