db_cache_size不能更新成功
今天想增大buffer cache的size(Oracle 10g)的大小,结果老是报错误:SQL> alter system set db_cache_size=80M scope=spfile;alter system set db_cache_size=80M scope=spfile*ERROR at line 1:ORA-32017: failure...
等值连接和自然连接的区别
1. 等值连接中不要求相等属性值的属性名相同,而自然连接要求相等属性值的属性名必须相同,即两关系只有在同名属性才能进行自然连接。如上例R中的C列和S中的D列可进行等值连接,但因为属性...
Oracle SQL JOIN
SQL JOINThe JOIN keyword is used in an SQL statement to query data from two or more tables, based on a relationship between certain columns in these tables.Tables in a database are often related to ...
Oracle中 HWM与数据库性能的探讨
本文讨论的是oracle中关于table的HWM的内容,主要包括这样几个内容:1. 什么是HWM?2. HWM是如何移动的。3. HWM对于性能的影响4. 何...
Oracle Start with ....Connect By
http://www.adp-gmbh.ch/ora/sql/connect_by.html http://www.dotblogs.com.tw/jeff-yeh/archive/2009/05/20/8489.aspxhttp://blog.chinaunix.net/space.php?uid=15028&do=blog&id=2779800
ORACLE常用结构和函数使用方法总结
Normal 0 false false false EN-US ZH-CN X-NONE</w:LidThemeComplexScript. MicrosoftInternetExplorer4 ...
Redo log 的分享与记忆
1. 查看redo log file的相关情况,a) select * from v$logfile;b) select * ...
Good documentation or books related to Oracle
1. Oracle Database Concepts2. Oracle 2 Day DBA3. Oracle Database Application Developer's Guide - Fundamentals4. Oracle Database Administrator's Guide5. Oracle Enterprise Manager Concepts6. Oracle Data...