V$BACKUP_SET_SUMMARY

V$BACKUP_SET_SUMMARY provides summary information for a backup set.

Column	Datatype	Description
`NUM_BACKUPSETS`	`NUMBER`	Total number of backup sets created
`OLDEST_BACKUP_TIME`	`DATE`	Oldest backup start time
`NEWEST_BACKUP_TIME`	`DATE`	Newest backup start time
`OUTPUT_BYTES`	`NUMBER`	Number of output bytes (not including multiple copies)
`ORIGINAL_INPUT_BYTES`	`NUMBER`	Number of input bytes when backup sets were created
`ORIGINAL_INPRATE_BYTES`	`NUMBER`	Average input rate
`OUTPUT_RATE_BYTES`	`NUMBER`	Average output rate
`COMPRESSION_RATIO`	`NUMBER`	Compression ratio
`ORIGINAL_INPUT_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for input bytes
`OUTPUT_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for output bytes
`ORIGINAL_INPRATE_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for input rate
`OUTPUT_RATE_BYTES_DISPLAY`	`VARCHAR2(4000)`	Displayable format for output rate