1、使用oracle用户登录，连接数据库

[oracle@wuzj ~]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Thu Feb 26 12:06:29 2009

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected.

//查看用户
SQL> select username,password from dba_users;

USERNAME         PASSWORD
------------------------------ ------------------------------
USER1          BBE7786A584F9103
MGMT_VIEW         4F538DF5F344F348
SYS          8A8F025737A9097A
SYSTEM          970BAA5B81930A40
DBSNMP          FFF45BB2C0C327EC
SYSMAN          2CA614501F09FCCC
OUTLN          4A3BA55E08595C81
MDSYS          72979A94BAD2AF80
ORDSYS          7EFA02EC7EA6B86F
EXFSYS          66F4EF5650C20355
DMSYS          BFBA5A553FD9E28A

USERNAME         PASSWORD
------------------------------ ------------------------------
WMSYS          7C9BA362F8314299
CTXSYS          71E687F036AD56E5
ANONYMOUS         anonymous
XDB          88D8364765FCE6AF
ORDPLUGINS         88A2B2C183431F00
SI_INFORMTN_SCHEMA        84B8CBCA4D477FA3
OLAPSYS          3FB8EF9DB538647C
SCOTT          F894844C34402B67
TSMSYS          3DF26A8B17D0F29F
BI          FA1D2B85B70213F3
PM          72E382A52E89575A

USERNAME         PASSWORD
------------------------------ ------------------------------
MDDATA          DF02A496267DEE66
IX          2BE6F80744E08FEB
SH          9793B3777CD3BD1A
DIP          CE4A36B8E06CA59C
OE          9C30855E7E0CB02D
HR          6399F3B38EDF3288

28 rows selected.

//修改用户口令 格式 alter user 用户名 identified by 新密码;

SQL> alter user system identified by manager;

User altered.

//再次查看，对比发现密码已经更换

SQL> select username,password from dba_users;

USERNAME         PASSWORD
------------------------------ ------------------------------
USER1          BBE7786A584F9103
MGMT_VIEW         4F538DF5F344F348
SYS          8A8F025737A9097A
SYSTEM          D4DF7931AB130E37
DBSNMP          FFF45BB2C0C327EC
SYSMAN          2CA614501F09FCCC
OUTLN          4A3BA55E08595C81
MDSYS          72979A94BAD2AF80
ORDSYS          7EFA02EC7EA6B86F
EXFSYS          66F4EF5650C20355
DMSYS          BFBA5A553FD9E28A

USERNAME         PASSWORD
------------------------------ ------------------------------
WMSYS          7C9BA362F8314299
CTXSYS          71E687F036AD56E5
ANONYMOUS         anonymous
XDB          88D8364765FCE6AF
ORDPLUGINS         88A2B2C183431F00
SI_INFORMTN_SCHEMA        84B8CBCA4D477FA3
OLAPSYS          3FB8EF9DB538647C
SCOTT          F894844C34402B67
TSMSYS          3DF26A8B17D0F29F
BI          FA1D2B85B70213F3
PM          72E382A52E89575A

USERNAME         PASSWORD
------------------------------ ------------------------------
MDDATA          DF02A496267DEE66
IX          2BE6F80744E08FEB
SH          9793B3777CD3BD1A
DIP          CE4A36B8E06CA59C
OE          9C30855E7E0CB02D
HR          6399F3B38EDF3288

28 rows selected.

SQL>

 //现在就可以用此密码链接进行操作了

SQL> connect system/manager

已连接。

==========================

另一种修改值的办法

SQL> alter user system identified by values '2D594E86F93B17A1';

用户已更改。

//在试试这个密码

SQL> connect system/oracle

已连接。

      //这个密码就不灵了

 

SQL> connect system/manager

ERROR:

ORA-01017: invalid username/password; logon denied

 

 本文转自茄子_2008博客园博客，原文链接：http://www.cnblogs.com/xd502djj/archive/2009/02/26/1398702.html，如需转载请自行联系原作者。