oracle自动备份教本，定时备份。每月一次全备份，每周一次累积备份，每天一次增量备份，备份后自动打包压缩，文件保存在本地并可通过scp上传到其他服务器-oracle automatic backup textbook, regular backups. Once a month a full backup once a week cumulative backup, incremental backup once a day, the backup automatically packaged