安裝完oracle 11g，過了好久才用，已經忘了初始化的用戶名和密碼了，怎么辦？

錄入 sqlplus /nolog 無用戶名登錄

conn /as sysdba 連接到數據本地數據

alter user system identified by password; 修改System 密碼 為password

或者打開sqlplus軟件: 

窗口用戶名錄入:/nolog 

D:\oracle\ora92\bin>sqlplus /nolog

SQL*Plus: Release 9.2.0.1.0 - Production on 星期四 8月 16 11:32:22 2007

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

SQL> conn /as sysdba
已連接。
SQL> alter user system identified by password;

用戶已更改。

SQL> alter user sys identified by password;

用戶已更改。

SQL> alter user system identified by manger;

解鎖方法
alter user system account unlock;

 這樣密碼修改成功了

 分配用戶名和密碼

CREATE USER username（用戶名） IDENTIFIED BY password(密碼);

grant create session to EPM;
grant create table to EPM;
grant create tablespace to EPM;
grant create view to EPM;
grant connect,resource,dba to EPM;

jdbc:oracle:thin:@192.168.XXX.XXX(IP):1521:實例名
用戶 username ;密碼 password;

select * from usr_zsj.v_user_to_bdcom;