It has a star or snowflake-like dimensional database schema design.
它具有星形或雪花形的维数据库模式设计。
But when you can design the database schema explicitly for your application, you often don't need a mapping framework.
但是当您能为应用程序显式地设计数据库模式时，您通常不需要映射框架了。
Similarly a database refactoring is a simple change to a database schema which improves the design without breaking nor adding anything.
类似的，数据库重构是对数据库方案的简单变更，是在不破坏且不添加东西的情况下改进设计。
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