V$BACKUP_DATAFILE_SUMMARY

V$BACKUP_DATAFILE_SUMMARY provides summary information for a specific criteria set, based on a backup job, a time range applicable to jobs, or a specific data file).

Column	Datatype	Description
`NUM_FILES_BACKED`	`NUMBER`	Number of files backed up for specified criteria
`NUM_DISTINCT_FILES_BACKED`	`NUMBER`	Number of distinct files backed up
`NUM_DISTINCT_TS_BACKED`	`NUMBER`	Number of distinct tablespaces backed up
`MIN_CHECKPOINT_CHANGE#`	`NUMBER`	Minimum checkpoint change number of the data file for specified criteria
`MAX_CHECKPOINT_CHANGE#`	`NUMBER`	Maximum checkpoint change number of the data file for specified criteria
`MIN_CHECKPOINT_TIME`	`DATE`	Minimum checkpoint time of the data file for specified criteria
`MAX_CHECKPOINT_TIME`	`DATE`	Maximum checkpoint time of the data file for specified criteria
`INPUT_BYTES`	`NUMBER`	Total input bytes of files read
`OUTPUT_BYTES`	`NUMBER`	Total output bytes written
`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
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. Possible values include: `0`: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. `1`: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data