| BTYPE | CHAR(9) | The type of this control file backup. Possible values are BACKUPSET,IMAGECOPYorPROXYCOPY. | 
| BTYPE_KEY | NUMBER | Unique identifier for the backup type. If BTYPEisBACKUPSET, then this value is theBS_KEYvalue for the backup set. IfBTYPEisIMAGECOPY, this value is the value ofCOPY_KEYfor the copy. IfBTYPEisPROXYCOPY, this is the value ofXCF_KEYfor the proxy copy. | 
| SESSION_KEY | NUMBER | Session identifier. Use in joins with RC_RMAN_OUTPUTandRC_RMAN_BACKUP_JOB_DETAILS. | 
| SESSION_RECID | NUMBER | The RECIDfrom the control file for the target database which corresponds to this RMAN session. | 
| SESSION_STAMP | NUMBER | The STAMPfrom 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 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 backups taken as backup sets, this column contains SET_STAMP. For proxy copy or image copy backups, this column contains theRECIDfrom the control file. | 
| ID2 | NUMBER | For backups taken as backup sets, this column contains SET_COUNT. For proxy copy or image copy backups, this column contains the value ofSTAMP. | 
| CREATION_TIME | DATE | File creation time for the control file that was backed up. | 
| RESETLOGS_CHANGE# | NUMBER | SCN of the RESETLOGSbranch where this control file was backed up. | 
| RESETLOGS_TIME | DATE | Time of the RESETLOGSbranch where this control file was backed up. | 
| CHECKPOINT_CHANGE# | NUMBER | Most recent checkpoint change SCN for the control file that was backed up. | 
| CHECKPOINT_TIME | DATE | Most recent checkpoint time for the control file that was backed up. | 
| FILESIZE | NUMBER | File size, in bytes, for the output of backing up this control file. | 
| COMPRESSION_RATIO | NUMBER | Compression ratio for this backup. | 
| FILESIZE_DISPLAY | VARCHAR2(4000) | Same value as the FILESIZEcolumn, but converted to a user-displayable format, for example, 798.01M or 5.25G. |