The author introduces some methods of SQL through analysis of enquiry optimizing strategy.
本文在分析查询优化策略的基础上，重点介绍了几种SQL查询语句的优化方法。
DSMS is a common model, which adopts window mechanics, continuous query and many optimizing strategy to online analyzing and disposing real-time data quickly and efficiently.
数据流管理系统提出了一种通用结构模型，它采用窗口机制，连续查询以及相应的优化策略迅速高效地对实时数据进行在线分析处理。
DSMS is a common model, which adopts window mechanics, continuous query and many optimizing strategy to online analyzing and disposing real-time data quickly and efficiently.
数据流管理系统提出了一种通用结构模型，它采用窗口机制，连续查询以及相应的优化策略迅速高效地对实时数据进行在线分析处理。
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