Programmers can work transparently with data from these various sources, relying on DB2 II's global query optimizer to select an efficient data access strategy for such work.

程序员可以透明地使用来自这些不同数据源的数据，并通过 DB2 II 全局查询优化器来选择一个有效的数据访问策略。

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When data has an object structure, the trade-offs are reversed: Writing efficient and maintainable code comes at the cost of efficient data access, storage, and scalability.

当数据具有对象结构时，上述关系恰好相反：编写高效的、可维护的代码要以牺牲数据访问、存储和可扩展性方面的高效性为代价。

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Index scans are usually the most efficient way to access data, especially when the table is large but the number of qualified rows is small.

一般来说，索引扫描是访问数据的最有效的方法，尤其是表很大但符合条件的行很少的时候。

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These cold storage data centers are under construction and are said to be five times more energy efficient than traditional HDD storage data centers, while allowing users to access old images anytime.

FORBES: Adventures in Archiving

Companies such as Eloan, Amazon Services and Knight Ridder pay Efficient a 5%-to-15% commission for access to its terabyte of data on which keywords and ad strategies have genuinely clinched sales.

FORBES: The Keyword Keeper