摘要： 对视图及其操作的管理是数据库管理系统(DBMS)的重要内容。本文着重从理论上对多视图数据库中视图的性质及其操作作了进一步的探讨,提出并证明了对视图进行修改操作的一般条件,解决了视图插入和删除可逆性的问题,并在此基础上给出了一个多级视图模型。

Abstract: Relational views are so significant that the management of view updating becomes an important part of database management system (DBMS). This paper focuses on properties and operations of view in multiple view database. A general condition for view updating is proved. The problem of insertion reversibility and deletion reversibility is solved by introducing mechanism to the database. Finally a multi-level view model is presented.