Incrementalnbsp;backup:

Incremental backup:
增量备份：>0
差量备份：>=0
Makes a copy of all data blocks that have changed since a previous
backup. The Oracle database supports two levels of incremental backup (0 and 1). A

level 1 incremental backup can be one of two types: cumulativeor differential. A

cumulative backup backs up all changes since the last level 0 backup. A differential

backup backs up all changes since the last incremental backup (which could be either a

level 0 or level 1 backup). Change Tracking with RMAN supports incremental backups.

eg
Y ou perform dif ferential incremental level1 backups of your databaseon each working

day and level  0  backup  on  Sundays,  to  tape.  
1.The  backup  performed  on  Monday  contains  all  the  blocks  that  have  changed  

since  the  level  0 backup,  and  every  other  working  day  contains  all  the  

blocks  that  have  changed  since  the  level  1 backup.
2.The  backup  performed  on  Sundays  contains  all  the  blocks  that  have  ever  

been  used  in  the database.