delete backup；

  delete backupset  delete noprompt backup  

  backup keep forver database   永久保存恢复目录中支持此命令  

  show parameter   control  

备份spfile  

    backup spfile 

    backup  current contrlfile           configure  controlfile  autoback off

    configure  controlfile  autoback format for device type disk to 路径

    configure  controlfile  autoback format for device type disk clear

备份归档日志

  backup database plus archivelog        backup  archivelog all 

  backup archivelog  all delete all input

 backup  archivelog all  delete input

4.映像副本

   backup as copy database           list copy显示归档日志文件

   backup as copy datefile 4           backup as copy datafile 4 format 路径