摘要
在分析比较分布式数据库系统和集中式数据库系统查询优化目标不同特点的基础上,归纳出分布式数据库系统的查询优化目标,进而提出查询优化的策略,并在举例中重点讨论了操作执行顺序的不同对查询性能的影响.
When adding distributed data into the database system, the distributed query process is very difficult and complicated, and the cost of query process is different due to different query process tactics. Query optimization in distributed system is more important and it has more notable effect. This article discusses the purposes and tactics, and presents how the different order affects the performance.
出处
《华东交通大学学报》
2007年第2期121-123,共3页
Journal of East China Jiaotong University
关键词
分布式数据库
分布式查询
查询优化
查询处理策略
distributed database
distributed query
query optimization
query process tactic
