了解Maclean Liu|向Maclean Liu提问 Oracle ALLSTARS 全明星(群内有多位Oracle高级售后support，N位OCM和ACE) QQ群 # QQ群号:23549328 # 已经升级到 2000人群，空位多多。欢迎有一定基础的Oracle骨友加入，现在入群需要经过Maclean的技术面试，欢迎面试，请加QQ号:47079569 为好友参加面试 2群基础群 适合刚入门的同学，会共享最佳入门实践和资料 QQ群 # QQ群号:171092051 # 已经升级到 500人的超级群，空位多多，无需面试

03 2009 档案

RBO基于规则的优化器access paths优先级
摘要：RBO基于规则的优化器access paths优先级:RBO Path 1: Single Row by RowidRBO Path 2: Single Row by Cluster JoinRBO Path 3: Single Row by Hash Cluster Key with Unique or Primary KeyRBO Path 4: Single Row by Unique or... 阅读全文

posted @ 2009-03-17 13:05 Oracle和MySQL 阅读(194) 评论(0) 推荐(0) 编辑

Histograms: An Overview
摘要：NOTE: This article was originally created for version 7.3. Conceptually the ideas presented arethe same as in later versions but implementation details may have changed or havebeen enhanced.Histograms... 阅读全文

posted @ 2009-03-07 09:05 Oracle和MySQL 阅读(184) 评论(0) 推荐(0) 编辑

How to trigger ORA-00600,ORA-7445 by manual
摘要：Sometime we'd like to trigger ORA-00600/7445 internal errors for testing purpose, But it's not easy if you don't know a little trick like below:declarea exception;pragma exception_init(a,-600);beginra... 阅读全文

posted @ 2009-03-05 03:28 Oracle和MySQL 阅读(193) 评论(0) 推荐(0) 编辑

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