这些业务应用程序同样还在有限的业务域里提供集成框架，用于后端或是遗留企业应用程序的集成。
Within the limited business domains, those business applications also provide an integration framework to integrate with back-end or legacy enterprise applications.
因为开发人员选择JDBC或基于JDBC的框架，所以dba只能使用有限的工具来帮助开发人员了解SQL来自哪个应用程序。
Because the developers chose JDBC or a JDBC-based framework, the DBA had limited tools to help the developer know what applications the SQL was coming from.
MVC框架允许开发者几乎没有限制地使用任意一种数据源，并能够轻松地在各种数据源之间进行切换。
The MVC Framework gives developers almost unlimited ability to use any data source and the ability to easily interchange between them.
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