| Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 | 
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V$BACKUP_ARCHIVELOG_SUMMARY provides archive log summary information based on archive logs in the backup set or on proxy copies.
| Column | Datatype | Description | 
|---|---|---|
| NUM_FILES_BACKED | NUMBER | Number of files backed up | 
| NUM_DISTINCT_FILES_BACKED | NUMBER | Number of distinct archive log files backed up | 
| MIN_FIRST_CHANGE# | NUMBER | Lowest SCN range value | 
| MAX_NEXT_CHANGE# | NUMBER | Highest SCN range value | 
| MIN_FIRST_TIME | DATE | Lowest SCN range time | 
| MAX_NEXT_TIME | DATE | Highest SCH range time | 
| INPUT_BYTES | NUMBER | Total input bytes read | 
| OUTPUT_BYTES | NUMBER | Output size of backups | 
| COMPRESSION_RATIO | NUMBER | Compression ratio | 
| INPUT_BYTES_DISPLAY | VARCHAR2(4000) | Displayable format for input bytes | 
| OUTPUT_BYTES_DISPLAY | VARCHAR2(4000) | Displayable format for output bytes |