V$BACKUP_ARCHIVELOG_SUMMARY

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`	The ratio between the total blocks in the datafile and the blocks that RMAN backed up. This is not the the ratio from the `AS COMPRESSED BACKUPSET` clause of the `BACKUP` command.
`INPUT_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for input bytes
`OUTPUT_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for output bytes