为了解决以“大集中”方式设计的企业管理系统的查询性能下降的问题，提出了完善的查询性能优化模型。
In order to solve query performance degradation problems of the enterprise management system designed by "big focus" approach, and propose a sound query performance optimization model.
开发人员必须编写代码来实现数据访问层，包括优化SQL查询、缓存结果以优化性能，而不会损害应用程序的规模。
Developers must write code to implement the data access layer, including optimizing SQL queries, caching results to optimize performance, without compromising an application's footprint.
最后，您将了解如何对查询进行分析以优化数据库的性能。
Finally, you'll see how you can profile your queries to optimize the performance of your database.
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