Incremental 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<wbr> 0<wbr> backup<wbr> on<wbr> Sundays,<wbr> to<wbr> tape. <wbr><br> 1.The<wbr> backup<wbr> performed<wbr> on<wbr> Monday<wbr> contains<wbr> all<wbr> the<wbr> blocks<wbr> that<wbr> have<wbr> changed <wbr><br><br> since<wbr> the<wbr> level<wbr> 0 backup,<wbr> and<wbr> every<wbr> other<wbr> working<wbr> day<wbr> contains<wbr> all<wbr> the <wbr><br><br> blocks<wbr> that<wbr> have<wbr> changed<wbr> since<wbr> the<wbr> level<wbr> 1 backup.<br> 2.The<wbr> backup<wbr> performed<wbr> on<wbr> Sundays<wbr> contains<wbr> all<wbr> the<wbr> blocks<wbr> that<wbr> have<wbr> ever <wbr><br><br> been<wbr> used<wbr> in<wbr> the database. </wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>