| 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 join with almost any other catalog view. | 
| NUM_BACKUPSETS | NUMBER | Total number of available backup sets recorded in the recovery catalog for this database. | 
| OLDEST_BACKUP_TIME | DATE | Creation time of the oldest available backup set recorded in the recovery catalog for this database. | 
| NEWEST_BACKUP_TIME | DATE | Creation time of the newest available backup set recorded in the recovery catalog for this database. | 
| OUTPUT_BYTES | NUMBER | Sum of sizes of all backup pieces for all available backup sets recorded in the recovery catalog for this database. | 
| ORIGINAL_INPUT_BYTES | NUMBER | Sum of sizes of all input files for all available backup sets recorded in the recovery catalog for this database. | 
| ORIGINAL_INPRATE_BYTES | NUMBER | Average input rate in bytes for the creation of all available backup sets recorded in the recovery catalog for this database. | 
| OUTPUT_RATE_BYTES | NUMBER | Average output rate in bytes for the creation of all available backup sets recorded in the recovery catalog for this database. | 
| COMPRESSION_RATIO | NUMBER | Aggregate compression ratio for all available backup sets recorded in the recovery catalog for this database. | 
| ORIGINAL_INPUT_BYTES_DISPLAY | VARCHAR2(4000) | Total size of all input files stored in all available backup sets recorded in the recovery catalog for this database. | 
| OUTPUT_BYTES_DISPLAY | VARCHAR2(4000) | Same value as OUTPUT_BYTES, but converted to a user-displayable format, for example, 798.01M or 5.25G. | 
| ORIGINAL_INPRATE_BYTES_DISPLAY | VARCHAR2(4000) | Same value as ORIGINAL_INPRATE_BYTES, but converted to a user-displayable format, for example, 798.01M or 5.25G. | 
| OUTPUT_RATE_BYTES_DISPLAY | VARCHAR2(4000) | Same value as OUTPUT_RATE_BYTES, but converted to a user-displayable format, for example, 798.01M or 5.25G. |