C:\>sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on 星期四 2月 23 16:57:51 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> connect sys/orcl as sysdba
已连接。
SQL> alter user system identified by manager;
#修改system用户的密码为manager
SQL> select username,password from dba_users;
#检索数据库所有用户的信息
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