ORACLE 忘记数据库密码

对于oracle10g来说：

1.如果不记得sys用户的密码了，采用如下方法可以修改密码：
(1)打开cmd，输入sqlplus /nolog，回车。
(2)输入“conn / as sysdba”;
(3)输入“alter user sys identified by 新密码;”（新密码必须以字母开头，另外每条SQL语句后得分号不能忘）
其他用户方式同理

2.(1)在cmd中启动sqlplus；

(2)用sqlplus/as sysdba登录，使其连接到:

Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production

(3)执行ALTER USER DBSNMP ACCOUNT UNLOCK；

(4) 从新用SQL/PLUS登录，设置用户名、密码；

附：Oracle 10g 默认安装带来的用户名/密码

Username

Password

Description

See Also

CTXSYS

CTXSYS

The Oracle Text account

Oracle Text Reference

DBSNMP

DBSNMP

The account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the database

Oracle Enterprise Manager Grid Control Installation and Basic Configuration

LBACSYS

LBACSYS

The Oracle Label Security administrator account

Oracle Label Security Administrator's Guide

MDDATA

MDDATA

The schema used by Oracle Spatial for storing Geocoder and router data

Oracle Spatial User's Guide and Reference

MDSYS

MDSYS

The Oracle Spatial and Oracle interMedia Locator administrator account

Oracle Spatial User's Guide and Reference

DMSYS

DMSYS

The Oracle Data Mining account.

Oracle Data Mining Administrator's Guide

Oracle Data Mining Concepts

OLAPSYS

MANAGER

The account used to create OLAP metadata structures. It owns the OLAP Catalog (CWMLite).

Oracle OLAP Application Developer's Guide

ORDPLUGINS

ORDPLUGINS

The Oracle interMedia user. Plug-ins supplied by Oracle and third party format plug-ins are installed in this schema.

Oracle interMedia User's Guide

ORDSYS

ORDSYS

The Oracle interMedia administrator account

Oracle interMedia User's Guide

OUTLN

OUTLN

The account that supports plan stability. Plan stability enables you to maintain the same execution plans for the same SQL statements. OUTLN acts as a role to centrally manage metadata associated with stored outlines.

Oracle Database Performance Tuning Guide

SI_INFORMTN_SCHEMA

SI_INFORMTN_SCHEMA

The account that stores the information views for the SQL/MM Still Image Standard

Oracle interMedia User's Guide

SYS

CHANGE_ON_INSTALL

The account used to perform database administration tasks

Oracle Database Administrator's Guide

SYSMAN

CHANGE_ON_INSTALL

The account used to perform Oracle Enterprise Manager database administration tasks. Note that SYS and SYSTEM can also perform these tasks.

Oracle Enterprise Manager Grid Control Installation and Basic Configuration

SYSTEM

MANAGER

Another account used to perform database administration tasks.