Different diagrams represent different views of the system, application, or database that you are developing.

不同的图表示您正在开发的系统、应用程序，或数据库的不同视图。

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The paradigm of SQL is that the user (or application) just tells the database system what to do and the system itself figures out the best way how to do it.

SQL 的范例是，用户（或应用程序）只需告诉数据库系统要 做什么，系统自己就会得出 如何做 这件事的最佳方法。

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Within a relational database system, most interactions between an application and the actual database are in the form of SQL statements within a session or connection.

在关系数据库系统内部，应用程序和实际数据库之间的主要交互都是以会话或连接的sql语句形式来实现的。

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Companies like FluidOps make replicating all levels of a virtual landscape--the data, database, application, and operating system--a one-click operation.

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