摘要
数据库是数据管理的最有效工具,由于数据库具有数据结构化、冗余度低、较高的程序与数据独立性等特点,所以较大的信息系统管理都采用了数据库技术。而科学地进行数据建模,是把现实世界的信息进行数据库管理的基础,对一个较完善的数据库模式,它至少要为第三规范形式。但在实际应用中,它往往不为人们所重视。下面以关系数据库系统为例,来对某校“教学数据库管理系统”进行建模分析。
Database is the most efficient tool of data management. Since the database has the advantages of data constructing, low redundance and higher independence of program as well as data, therefore the technology of database is applied to the management of larger information system to corstruct a better data model is the base of managing information with database. A better model of database should at least be the Third Normal Form. But in practice, is usually missed by some people. Here is an example of the relation database to illustrate the modeling of the teaching management of university.
出处
《黑龙江八一农垦大学学报》
2003年第2期93-96,共4页
journal of heilongjiang bayi agricultural university
关键词
实体
关系
概念数据库模式
逻辑数据库模式
范式
entity
relation
concept database model
logical database model
normal form
