oracle忘记用户名密码

oracle忘记用户名密码 一、忘记除SYS、SYSTEM用户之外的用户的登录密码。 用SYS (或SYSTEM)用户登录。 CONN SYS/PASS_WORD AS SYSDBA; 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。 CONN SYS//PASS_WORD AS SYSDBA; 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。 CONN SYSTEM//PASS_WORD ; 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。 一、 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。 方法二、 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 Oracle Enterprise component of Oracle Enterprise Manager to Manager Grid Control monitor and manage the database Installation and Basic Configuration LBACSYS LBACSYS The Oracle Label Security administrator Oracle Label Security account Administrator's Guide MDDATA MDDATA The schema used by Oracle Spatial for storing Oracle Spatial User's Geocoder and router data Guide and Reference MDSYS MDSYS The Oracle Spatial and Oracle interMedia Oracle Spatial User's Locator administrator account 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 Oracle OLAP structures. It owns the OLAP Catalog Application (CWMLite). Developer's Guide ORDPLUGINS ORDPLUGINS The Oracle interMedia user. Plug-ins Oracle interMedia supplied by Oracle and third party format User's Guide plug-ins are installed in this schema. ORDSYS ORDSYS The Oracle interMedia administrator account Oracle interMedia User's Guide OUTLN OUTLN The account that supports plan stability. Oracle Database Plan stability enables you to maintain the Performance Tuning same execution plans for the same SQL Guide statements. OUTLN acts as a role to centrally manage metadata associated with stored outlines. SI_INFORMTN_SCHEMA SI_INFORMTN_SCHEMA The account that stores the information views Oracle interMedia for the SQL/MM Still Image Standard User's Guide SYS CHANGE_ON_INSTALL The account used to perform database Oracle Database administration tasks Administrator's Guide SYSMAN CHANGE_ON_INSTALL The account used to Oracle Enterprise perform Oracle Enterprise Manager database Manager Grid Control administration tasks. Note that SYS and Installation and Basic SYSTEM can also perform these tasks. Configuration SYSTEM MANAGER Another account used to perform database administration tasks.