没有对JDBC驱动程序的引用，没有服务器名称，没有用户名称或口令——甚至没有数据库池或连接管理。
No references to JDBC drivers, no server names, no user names or passwords — not even database pooling or connection management.
DbContext是ObjectContext的简化版本，提供了基本的模型缓存、数据库供应、连接管理及模式创建等功能。
DbContext is a simplified version of ObjectContext, providing basic functionality for model caching, database provisioning, connection management, and schema creation. An example looks as following.
连接管理和系统资源管理：连接管理基础设施使用户能够定义、编辑或删除到IBM和非ibm数据库的连接。
Connection management and system resource management: The connection management infrastructure enables users to define, edit, or delete connections to IBM and non-IBM databases.
由于到后端系统(如数据库)的连接通常在事务中获取，因此这时也启用对连接管理器的跟踪将很有用。
Since connections to backend systems (such as databases) are often enlisted in transactions, it is useful to enable tracing for the connection manager component also.
由于到后端系统(如数据库)的连接通常在事务中获取，因此这时也启用对连接管理器的跟踪将很有用。
Since connections to backend systems (such as databases) are often enlisted in transactions, it is useful to enable tracing for the connection manager component also.
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