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本文来自CSDN博客         OS验证指的是Oracle数据库不再自行检查请求用户的合法性，而是将此过程委托给用户所在的操作系统，由操作系统代理完成用户合法性的检查工作。...

什么是checkpoint        在数据库系统中，写日志和写数据文件是数据库中IO消耗最大的两种操作，在这两种操作中写数据文件属于分散写，写日志文件是顺序写，因此为了保证数据库...

1. undo_management指定UNDO数据的管理方式.(自动管理模式:AUTO;手动管理模式:MANUAL）使用自动管理模式时,oracle会使用undo表空间管理undo；使用手工管理模式时,oracle会使用回滚段管理undo数据,需要注意,使用...

一段代码，用于禁止用户登录，执行时报以下错误：Executed as user: NT AUTHORITY\SYSTEM. Configuration option 'allow updates' changed from 1 to 1. Run the RECONFIGURE statement to install. [SQLSTATE 01000...

create proc p_helpindex@tbname sysname ='' ,@CLUSTERED int = '1'as--生成索引信息及索引创建脚本 --author : happyflystone--         Http://blog.csdn.net/happyflys...

http://www.diybl.com/course/7_databases/sql/sqlServer/2007926/73855_3.html 曾经试着写过一个存储过程,作用就是删除所有表的内容,思路是这样的:   首先通过sysobjects表构造一个sql语句字符串...

数据库中的每个索引和表在表中各占一行。该表存储在每个数据库中。列名 数据类型 描述 id                  表 ID（如果 i...

　　number(p,s)　　p:1~38　　s:-84~127 　　p>0，对s分2种情况分析：　　1. s>0　　精确到小数点右边s位，并四舍五入。然后检验有效数位是否<=p；假如s>p，小数点右边至少有s-p个0填充。　　2. s<0　　精确到小...

alert 日志中发现以下报错信息：Wed Jun  3 11:02:14 2009ORA-00060: Deadlock detected. More info in file /u01/product/admin/wind/udump/wind_ora_18786.trc. 文件/u01/product/admin/wind/udump/w...

现象：进行查询等操作时，提示““The log file for database 'tempdb' is full.Back up the transaction log for the database to free up some  log  space.”进入企业管理器查看，database下显示no i...

What you are seeing is not related to locks, rather it is related to the latch waits you see in sysprocesses.  In SP4 we are able to determine the blocking spid for latch waits when the blocking ...

Error 3101Severity Level 16Message TextExclusive access could not be obtained because the database is in use.ExplanationThis error occurs when you attempt to load a backup while users are accessing t...

Linux5下安装ORACLE10.2.0.4时，图形界面出不来，报错：Exception :java.lang.UnsatisfiedLinkError:/u01/product/oracle/jdk/jre/lib/i386/libawt.so: libXp.so.6: cannot open shared object file: No such file ...

http://www.linuxsky.org/doc/newbie/200801/230.html1.列出所有可更新的软件清单命令：yum check-update2.安装所有更新软件命令：yum update3.仅安装指定的软件命令：yum install <package_name>4.仅更新指定的...

 今天重建EM资料库后，emctl start dbconsole 提示以下错误：shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory查找资料发现，该错误...

Oracle Error : ORA-19905: log_archive_format must contain %%s, %%t and %%r Cause: log_archive_format is missing a mandatory format element. Starting with Oracle 10i, archived log file names must conta...

Oracle10G的EM采用了web方式，并且分成了2个产品，database control和grid control。 Oracle10G的EM采用了web方式，并且分成了2个产品，database control和grid control。Grid control需要...

SHUTDOWN NORMALNormal is the default shutdown mode. A normal database shutdown proceeds with the following conditions:•        No new connections can be made...

Starting Up an Oracle Database Instance: NOMOUNT When starting the database instance, select the state in which it starts. The following scenarios describe different stages of starting up an instance...

Each database has an alert_<sid>.log file. The file is on the server with thedatabase and is stored in the directory specified with the background_dump_dest initialization parameter. The alert file of...