Instead, the focus is on the components required to deliver effective search results: the database, the index, the search engine, and the PHP application program interface (API).

相反，重点讨论交付有效搜索结果所需的组件：数据库、索引、搜索引擎和PHP应用程序编程接口(API)。

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SQL is the standar user and application program interface to a relational database.

SQL语言是用户和应用程序与关系数据库的标准接口。

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This paper introduces measures and techniques adopted for enhancing speed of program, optimizing us - er interface, increasing flexibility, ect. in developing database application software.

介绍数据库应用软件开发过程；围绕提高程序的速度、优化用户界面、增强程序灵活性等性能指标所采取的措施与技巧。

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