基于Oracle分布式数据库的查询优化王君,祝永志,魏榕晖,李丙锋(曲阜师范大学计算机科学学院,山东日照276826)摘要:随着信息和网络技术的发展,分布式数据库得到了广泛的发展,其中Oracle分布式数据库在企业管理中得到了极大的应用。为了能够更好地提高企业的竞争力,对Oracle分布式数据库的查询进行优化成为必要,从介绍Oracle分布式数据库的两种基本结构出发,重点介绍了几种不同的Oracle分布式数据库的查询优化方法及其SQL语句的实现,并且通过试验对优化方法的性能进行了测试,然后通过数据的对比体现出了查询优化前后的差别,最后给出了可能影响查询优化性能的因素。关键词:Oracle;分布式;数据库;查询;优化中图分类号:文献标识码:文章编号:1673-629X(2008)01-0157-04OptimizingofQueryBasedonOracleDistributedDatabaseWANGJun,ZHUYong-zhi,WEIRong-hui,LIBing-feng(CollegeofComputerScience,QufuNormalUniversity,Rizhao276826,China)Abstract:WiththedevelopmentoftheinformationandInternettechnology,thedistributeddatabasehasmademanypublicapplications,inwhichOracledistributionaldatabaseobtainedtheenormousapplicationinthebusinessmanagement.Inordertogetbetterenhanceoftheenterprise’scompetitivepower,itisnecessarytocarryontheOracledistributionaldatabaseinquiryoptimizes.MainlyproposessomemethodswiththeSQLsentencesrealizationtotheoptimizingofquerybasedontheintroductionofthetwokindsofstructureabouttheOracledistributeddatabase,andcarryonthetestofthemethods’performancethroughtheexperiment,thenmanifestthedifferencethroughthedatacontrast,andgivesomepossiblyfactorsofaffectingtheinquiryoptimizationperformanceintheend.Keywords:Oracle;distributed;database;query;optimizing