数据库查询优化规划

The Optimal Planning of Database Query

数据库系统是管理信息系统的核心，是银行、企业、政府等众多部门最为重要的应用。而应用当中，查询操作是重中之重，并且查询操作往往需要花费时间和空间等资源。所以它的效率高低就很大程度上决定了数据库的在整体效率。同时也决定了系统的效率。本文重点围绕数据库的查询优化从需求分析、设计到使用等多方面提出了技术改进和利用。

The database system is the core of management information systems, and also the most important applications in many departments such as banks, enterprises, government and so on. Within the application, the query operation is the most important and it requires time, space and other resources.So its efficiency will largely determine the overall efficiency of the database and the efficiency of the system. This article focuses on the database query optimization and introduces some technological improvements and employment of its demand analysis, design and usage.