Home Database Mysql Tutorial Oracle忘记用户名密码怎样恢复

Oracle忘记用户名密码怎样恢复

Jun 07, 2016 pm 05:14 PM

首先cmd - sqlplusw 普通用户登陆:用户名:scott(普通用户名) 密码:tiger(普通用户密码) 管理员登陆:用户名:system

首先cmd - sqlplusw

普通用户登陆:用户名:scott(普通用户名)      密码:tiger(普通用户密码)

管理员登陆:用户名:system 密码:system(管理员密码)

超级管理员登陆的时候注意:用户名:sys 密码:sys as sysdba(sys 为密码)

一、忘记除SYS、SYSTEM用户之外的用户的登录密码。

  使用如下语句修改用户的密码。

  ALTER USER user_name IDENTIFIED BY newpass;

  注意:密码不能全是数字。并且不能是数字开头。否则会出现:ORA-00988: 口令缺失或无效

  二、忘记SYS用户,或者是SYSTEM用户的密码。

  如果是忘记SYSTEM用户的密码,可以用SYS用户登录。然后用ALTER USER 密令

  修改密码。

  ALTER USER SYSTEM IDENTIFIED BY newpass;

  如果是忘记SYS用户的密码,可以用SYSTEM用户登录。然后用ALTER USER 密令

  修改密码。

  ALTER USER SYSTEM IDENTIFIED BY newpass;

  三、如果SYS,SYSTEM用户的密码都忘记或是丢失。

  这一项尤其重要。

  可以使用ORAPWD.EXE 工具修改密码。

  开始菜单->运行->输入‘CMD’,打开命令提示符窗口,,输入如下命令:

  orapwd file=D:\Oracle\product\10.2.0\db_1\database\pwdctcsys.ora

  password=newpass

  这个命令重新生成了数据库的密码文件。密码文件的位置在ORACLE_HOME目录下

  的\database目录下。

  这个密码是修改sys用户的密码。除sys和system其他用户的密码不会改变。

  四、查看Oracle系统里的用户列表

  select * from all_users;

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