A.SELECT name FROM?V$CONTROLFILE B.SELECT name FROM?V$CTRLLFILE C.SELECT name FROM?V$USERFILES D.SELECT name FROM?V$DBAFILE
A.v$backup_status B.v$backup C.v$backup_datafile D.v$datafile_backup
A.Oracle Net B.侦听器 C.Oracle连接管理器 D.Oracle数据库驱动程序