A.V$DATAFILE B.V$DATAFILE_HEADER C.DBA_DATA_FILES D.V$DBFILE E.V$DATAFILE_ERRORS
A.1 day B.5 days C.7 days D.31 days
A.Shut down the database. B.Set the appropriate parameters in init.ora file. C.Start the database in NOMOUNT state. D.Issue the ALTER DATABASE ARCHIVELOG command. E.Open the database. F.Take a full closed backup.