数据库应用系统中关键代码属性的设置原则

数据库应用系统中的绝大多数关键属性均以代码形式出现,其设置的规范性和设置的方法对系统的性能有很大影响。对代码属性、主文件及代码文件进行了详细的分类,对不同类型的代码给出了通用的设置原则和各自的设计规范。针对经常出现的分级代码,给出了两类设置原则。实践表明,这些原则可有效保证代码关键属性的正确设置。

Setting principles of key code attribute in database application system

Most of the key attributes in database application system are usually presented as code form,and their setting standardization and methods may have important influences on the system performance.The types of code attribute,primary file and code file are divided in details,then the general setting principles and design standardization fitting for different code are proposed.Aiming at grading codes,two grade setting principles are presented.Practical application results show that these principles can assure the key code attributes set correctly.