| BTYPE | CHAR(9) | The backup type container, which can be BACKUPSET,IMAGECOPYorPROXYCOPY. | 
| BTYPE_KEY | NUMBER | A unique identifier for the backup type. For backupsets, it is VS_KEY; for image copies, it is COPY_KEY; for proxy copies it is XAL_KEY. | 
| SESSION_KEY | NUMBER | Unique identifier for this session. | 
| SESSION_RECID | NUMBER | The RECID from the control file for the target database which corresponds to this RMAN session. | 
| SESSION_STAMP | NUMBER | The STAMP from the control file for the target database which corresponds to this RMAN session. | 
| DB_KEY | NUMBER | The primary key for this database in the recovery catalog. Use this column to form a join with almost any other catalog view. | 
| DB_NAME | VARCHAR2(8) | The DB_NAMEof the database incarnation to which this record belongs. | 
| ID1 | NUMBER | For archived logs in backup sets, this column contains SET_STAMP. For proxy copy or image copy backups, this column contains the RECID from the control file. | 
| ID2 | NUMBER | For archived logs in backup sets, this column contains SET_COUNT. For image copy or proxy copy backups, this column contains STAMP. | 
| THREAD# | NUMBER | Thead number of this archived redo log file. | 
| SEQUENCE# | NUMBER | Sequence number of this archived redo log file. | 
| RESETLOGS_CHANGE# | NUMBER | SCN of OPEN RESETLOGS branch for this archived log. | 
| RESETLOGS_TIME | DATE | Time of OPEN RESETLOGS branch for this archived log. | 
| FIRST_CHANGE# | NUMBER | Starting SCN for this archived log file. | 
| FIRST_TIME | DATE | Time corresponding to starting SCN for this archived redo log file. | 
| NEXT_CHANGE# | NUMBER | Ending SCN for this archived redo log file. | 
| NEXT_TIME | DATE | Time corresponding to the ending SCN for this archived redo log file. | 
| FILESIZE | NUMBER | Size of backed up redo log file, in bytes. | 
| COMPRESSION_RATIO | NUMBER | Compression ratio for this backup. | 
| FILESIZE_DISPLAY | VARCHAR2(4000) | Same value as FILESIZE, but converted to a user-displayable format, for example nM, nG, nT, nP. |