| DB_NAME | VARCHAR2(8) | The DB_NAMEof the database incarnation to which this record belongs. | 
| 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. | 
| NUM_FILES_BACKED | NUMBER | The number of archived redo log files backed up. | 
| NUM_DISTINCT_FILES_BACKED | NUMBER | The number of distinct archived redo log files backed up, where redo logs are distinguished by unique log sequence number, thread number, and resetlogs branch. | 
| MIN_FIRST_CHANGE# | NUMBER | The lowest SCN in the range of archived redo log files that have been backed up. | 
| MAX_NEXT_CHANGE# | NUMBER | The highest SCN in the range of archived redo log files that have been backed up. | 
| MIN_FIRST_TIME | DATE | The earliest point in time covered by the archived redo log files that have been backed up. | 
| MAX_NEXT_TIME | DATE | The latest point in time covered by the archived redo log files that have been backed up. | 
| INPUT_BYTES | NUMBER | The total size in bytes of all archived redo log files that have been backed up. | 
| OUTPUT_BYTES | NUMBER | Sum of sizes of all output pieces generated by this job. | 
| COMPRESSION_RATIO | NUMBER | Compression ratio for this backup. | 
| INPUT_BYTES_DISPLAY | VARCHAR2(4000) | Same value as INPUT_BYTES, but converted to a user-displayable format, for example nM, nG, nT, nP. | 
| OUTPUT_BYTES_DISPLAY | VARCHAR2(4000) | Same value as OUTPUT_BYTES, but converted to a user-displayable format, for example nM, nG, nT, nP |