Differences between full ORACLE backup and zero-level Incremental Backup

Comparison of differences between full ORACLE backup and 0-level Incremental backup FullA backup of a datafile that includes des every allocated block in the file being backed up. A full backup of a datafile can be an image copy, in which case every data block is backed up. it can also be stored in a backup set, in which case datafile blocks not in use may be skipped, according to rules in Oracle Database Backup and Recovery Reference. A full backup cannot be part of an incremental backup strategy; that is, it cannot be the parent for a subsequent incremental backup. incrementalAn incremental backup is either a level 0 backup, which provided des every block in the file failed t blocks compressed out because they have never been used, or a level 1 backup, which threads des only those blocks that have been changed since the parent backup was taken. A level 0 incremental backup is physically identical to a full backup. the only difference is that the level 0 backup is recorded as an incremental backup in the RMAN repository, so it can be used as the parent for a level 1 backup. the phrase The only difference between a level 0 backup and a full backup is that a full backup is never provided in an incremental strategy. if no level 0 backup exists when you run a level 1 or higher backup, RMAN makes a level 0 backup automatically to serve as the base. incremental Backup level 0 and full backup are all full backups. However, if Incremental Backup level 0 uses rman backup, only used block is backed up, and used and unused block is backed up in full backup, there are two differences between the two. 1. Full backup cannot be used as the basis for level 1 Incremental backup. 2. When using rman backup, full backup backs up used and unused blocks, if rman is used for level 0 backup, only used block is backed up.