备份与恢复是数据库管理员维护数据库安全性和完整性的重要操作。
The database manager defends the database security and the complete important operation is the backup with restores.
介绍了多级安全数据库的完整性与保密性，展示了多级模型，从深度和广度探讨了数据库的多级安全问题。
The features of multilevel security of database, such as its integrity, security and serviceability, are analysed both in depth and in width by way of a multilevel security model illustration.
最后论文结合数据库系统的设计，论述了数据完整性，从信息安全和网络安全两个方面对系统安全性进行了设计与研究。
Finally, Combined with the design of database system, the paper discusses the data integrity, and does some design and research on system security through information security and network security.
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