可以以不同的方式使用版本控制来管理数据库变更项目。

You can use version control in different ways to manage your database change projects.

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再结合使用对ALTER table语句的改进，就可以方便地管理数据库解决方案的不同版本。

In combination with enhancements to the ALTER TABLE statement, a convenient way for managing different versions of a database solution was created.

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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.

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