说明：  　　 本文讨论了Visual Basic应用程序访问SQL Server数据库的几种常用的方法，分别说明了每种方法的内部机理并给出了每种方法的一个简单的实例，最后比较了每种方法性能和优缺点。
(This article discusses the Visual Basic applications to access SQL Server database of several commonly used method, respectively, the internal mechanism of each method and each method gives a simple example, the last comparison of the performance and the advantages and disadvantages of each method .)