Oracle 11g忘记sys、system、scott密码该这样修改！

1.启动sqlplus

2.请输入用户名: sqlplus/as sysdba

3.输入口令: 直接回车



4.连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>alter user sys identified by admin;
用户已更改。
SQL> conn sys/admin as sysdba;
已连接。
SQL> alter user system identified by manager;
用户已更改。