| 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 | Total number of archived redo log files backed up. | 
| NUM_DISTINCT_FILES_BACKED | NUMBER | Number of distinct archived redo log files backed up. | 
| MIN_FIRST_CHANGE# | NUMBER | Minimum value for the first SCN of any redo log file in this summary. | 
| MAX_NEXT_CHANGE# | NUMBER | Maximum value for the "next change#" SCN of any redo log file in this summary. | 
| MIN_FIRST_TIME | DATE | Minimum value for the time of the first change in any redo log. Along with MAX_NEXT_TIME, forms the redo range. | 
| MAX_NEXT_TIME | DATE | Maximum value for the time of the next change after any redo logs in this session. | 
| OUTPUT_BYTES | NUMBER | Sum of sizes of all output pieces generated by this job. | 
| OUTPUT_BYTES_DISPLAY | VARCHAR2(4000) | Same value as OUTPUT_BYTES, but converted to a user-displayable format, for example nM, nG, nT, nP. |