用它的所有回滚段重新创建回滚表空间。
Recreate the rollback tablespace with all of its rollback segments.
retention能做好地工作如果——当前的回滚表空间对活动事务有足够的空间。
RETENTION parameter works best if the current undo tablespace has enough space for the active transactions.
对于联机备份，需要特别注意SYSTE m表空间和回滚段表空间。
For online backup, special care needs to be taken for the SYSTEM table space and rollback segments table space.
从属于传统回滚段表空间的数据文件的丢失中恢复。
Recovering from the loss of a data file that belongs to a traditional rollback segment tablespace.
从属于传统回滚段表空间的数据文件的丢失中恢复。
Recovering from the loss of a data file that belongs to a traditional rollback segment tablespace.
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