Users running ole db applications need a connection for each open connection object , users running open database connectivity odbc applications need a connection for each active connection handle in the application , and users running db - library applications need one connection for each process started that calls the db - library 对于运行ole db应用程序的用户，每个打开的连接对象需要一个连接；对于运行开放式数据库连接( odbc )应用程序的用户，每个活动连接句柄需要一个连接；对于运行db - library应用程序的用户，每个调用db - library
The . net framework version 1 . 1 provides improved scalability and performance , support for mobile device development with asp . net mobile controls formerly the microsoft mobile internet toolkit , support for internet protocol version 6 , and ado . net classes for native communication with open database connectivity odbc and oracle databases . net framework 1 . 1版增强了可伸缩性和性能，支持利用asp . net移动控件开发适用于移动设备的应用程序（以前利用microsoft mobile internet工具包进行开发） ，它还支持通过internet协议版本6和ado . net类与开放式数据库连接( odbc )和oracle数据库进行本机通信。
In the database server construction , we emphasized on how to create new user database and its objects using sql server 7 . 0 and transact - sql . we also introduced the measures adopted to ensure the safety of the database ; in the design of application software , we discussed how to realize the two modules of query and management of database using c + + builer . by the comparison of a few kinds of datasets in c + + builer , we got a deeper understanding of the principle of database query ; on closing this paper , we elaborated on the bde and odbc , and made efficient improvement on system function and executed helpful maintenance with the tools of sql server manager 在数据库的创建中，本文着重论述了如何使用sqlserver7 . 0以及transact - sql结构化查询语言在服务器端创建用户数据库及数据库对象，并且介绍了在用户数据库中采取的安全性措施；在客户端数据库应用程序的设计中，按照设计的思路论述了如何用c + + builder编程语言实现数据库查询和管理两大模块，并通过对几种数据集组件的比较从更深的层面研究了数据库查询的实现；最后，本文深入阐述了c + + builder的数据库引擎( bde )和开放式数据库连接( odbc ) 。
