| 浅谈分布式数据库系统查询优化 |
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| 引用本文： | 李英. 浅谈分布式数据库系统查询优化[J]. 数字社区&智能家居, 2010, 0(4): 790-792 |
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| 作者姓名： | 李英 |
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| 作者单位： | 商丘师范学院计算机科学系,河南商丘476000 |
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| 摘 要： | 分布式数据库系统的查询优化，就是要寻找执行代价最小的查询执行策略，使系统执行效率达到最高。我们在应用中需要选择适当优化方法，在执行代价和便捷度之间得到最佳执行方案。
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| 关 键 词： | 分布式数据库系统 查询优化 执行代价 半联接 |
Query Optimization in Distributed Database Systems |
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| LI Ying. Query Optimization in Distributed Database Systems[J]. Digital Community & Smart Home, 2010, 0(4): 790-792 |
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| Authors: | LI Ying |
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| Affiliation: | Department of Computer Science;Shangqiu Normal College;Shangqiu 476000;China |
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| Abstract: | The query optimization in distributed database systems is to look for execution plan for a query at minimum cost. Using this plan the system can work efficiently. We should choose the suitable method to get the best execution plan between costs and conveniences. |
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| Keywords: | distributed database systems query optimization executed consideration semi-join |
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