oracle support一次危机处理（之一）
天有不测风云，
IBM 的中端磁盘阵列这次又惹祸了。在微码升级的时候，
DS4800 发生故障。IBM工程师把阵列故障恢复后，拍拍屁股走人，留下了阵列上不一致的数据。
没办法，阵列上的数据又得我们来想办法抢救了。。。。
还好有oracle support的支持我们最终化解了这次危机。下文详细介绍了整个恢复的过程。
oracle工程师到达现场后，根据错误信息，
问题情况如下SR信息所示：（HP-UX PA-RISC (64-bit)+ORACLE 9.2.0.8.0.+filesystem+no archivelog mode+no backup)
** Customer's Management 24x7 contact name:***************
** Customer's Management 24x7 contact number: ****************
** Primary Customer contact name: *******************
** Current Customer 24x7 voice phone number: ********************
** Current Customer E-mail address: ********************
** Current Customer Pager/Fax number: *****************
### Characteristics of Problem ###
This is a critical production system
Database is down and will not start
Data corruption issue and media recovery failed to fix the problem
### Note:28814.1 did not help because: ###
It did not have the needed information.
### Other: Note:28814.1 did not help because: ###
Sys owned objects corrupted
### The corruption was detected on: ###
Data file.
### Other: The corruption was detected on: ###
system tablespace
### The corruption affected a segment of type: ###
Table.
### Other: The corruption affected a segment of type: ###
TRANSACTION MANAGED DATA BLOCK
### The affected segment belongs to: ###
Database Dictionary.
### Other: The affected segment belongs to: ###
Database dictionary
### What error(s) and message(s) are Oracle reporting? ###
09:52:24 SQL> recover database allow 1 corruption;
ORA-00283: recovery session canceled due to errors
ORA-10562: Error occurred while applying redo to data block (file# 1, block# 1490)
ORA-10564: tablespace SYSTEM
ORA-01110: data file 1: '/oradata/yincang/rlv_system'
ORA-10561: block type 'TRANSACTION MANAGED DATA BLOCK', data object# 201
ORA-00600:
相关文档：
存储过程
==========================================================================
==========================================================================
【训练15.1】 创建一个显示雇员总人数的存储过程。
步骤1：登录SCOTT账户(或学生个人账户)。
步骤2： ......
oracle grant
授权语句--select * from dba_users; 查询数据库中的所有用户
--alter user TEST_SELECT account lock; 锁住用户
--alter user TEST_SELECT account unlock; 给用户解锁
--create user xujin identified by xujin; 建立用户
--grant create tablespace to xujin; 授权
--grant select ......
•表分区技术是在超大型数据库(VLDB)中将大表及其索引通过分区（patition）的形式分割为若干较小、可管理的小块，并且每一分区可进一步划分为更小的子分区（sub partition）
•通过对表进行分区，可以获得以下的好处
–减少数据损坏的可能性
–各分区可以独立备份和恢复，增强了数据库的可管理性
......
[root@GISDB ~]$ su - oracle
[oracle@GISDB ~]$ sqlplus /nolog
SQL*Plus: Release 10.2.0.4.0 - Production on Tue Oct 13 11:03:03 2009
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
SQL> conn /as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
To ......
/**
*
*/
package com.huawei.widget.util;
import java.math.BigDecimal;
/**
* @author tanjixuan
* @since 2008-12-20
*
*/
public final class DatabaseUtil
{
// oracle转义字符
public static final char ORACLE_ESCAPE_CHAR = '\\';
// orac ......
