Base on the traditional query optimize technologies analyse , Object-Oriented Method (OO) is recommended to set up aOO model by 7 abstract class which is from the analyse of the SELECT syntax structure.

• 在分析传统SQLSERVER查询优化技术的基础上,本文用面向对象方法分析了SQL语句中的查询语句SELECT语法结构,概括出基于表达式类等7个抽象类的面向对象模型。