Oracle 视图 V$BACKUP_SET_SUMMARY 官方解释，作用，如何使用详细说明

网络编程 Oracle 视图 V$BACKUP_SET_SUMMARY 官方解释，作用，如何使用详细说明 10-15

Oracle视图V$BACKUP_SET_SUMMARY提供有关每个备份集的汇总信息。每个备份集有一行记录。

用途：

该视图可用于查找单个备份操作的汇总信息，如备份的数据库文件、备份的数据量大小和时间戳，以及备份集的状态。

使用方法：

通过在视图V$BACKUP_SET_SUMMARY中查询，可以轻松检索有关当前和历史备份集的信息：

SELECT * FROM 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`	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.
`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
`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