摘要
本文用面向对象方法分析了SQL的SELECT语句的语法结构,概括出基于表达式面向对象的类模型。在查询界面中,用户可以随意地创建、删除、组合或拆分这些对象,构造出复杂多样的表达式树,有效地实现了数据库的动态查询。
This paper introduce the object-oriented approach to the analysis of the syntax structure of SELECT statement of SQL, and generalize the object-oriented model based on the class of expression. On the user interface, user can flexibly create, destroy, combine or split all kinds of expression objects to construct the complex tree of expressions, thus the dyramie query in Database is implemented efficiently.
出处
《中山大学研究生学刊（自然科学与医学版）》
2002年第1期5-10,共6页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
