oracle 忘记system密码

1、cmd进入dos

2、D:\oracle\ora92\bin>sqlplus /nolog
3、SQL> conn /as sysdba
4、SQL> alter user system identified by password;
5、SQL> exit
6、D:\oracle\ora92\bin>sqlplus
请输入用户名: system
请输入口令:

连接到:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production