单级到两级应用系统的升级以及实现方法

The Updating Method from Single Layer to Double Layer

根据作者在应用系统开发中的实践经验，总结了利用ODBC，ADO，BDE等技术在Access，Foxpro，dBASE与Oracle之间数据交换的几种方法；并且结合Dephi开发工具说明了单级到两级应用系统的升级以及实现方法。

In this paper, according to the experience of the application development the author summarizes several data exchange methods among the databases of Access，Foxpro，dBASE and Oracle with the technologies of ODBC, ADO, and BDE. Then the author explains updating method from single layer to double layer with the Delphi development tool.