... 数据库闪回（flashback database） 用户管理的恢复（user-managed recovery） 表（table） ...
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用户管理的备份和恢复 User-Managed Backups & Recovery ; racle
他们还会被迫寻找一名数据库管理员，要求他将图表和用户数据库恢复到其升级之前的状态。
They also recall the embarrassment that ensued when they were forced to call a database administrator to ask for the schema and user databases to be restored to their pre-upgrade state.
给出了数据库加密技术和依赖用户的可恢复密钥管理机制的设计，实现了用户密钥的安全存储、备份与恢复。
Database encryption and user-dependent restorable key management scheme insure the security of key storing, backuping and restoring.
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