忘了Oracle Sys System 密碼怎辦

安裝的時候可能隨便打一個 SYS SYSTEM 的密碼，
忘了怎麼辦，忘了就忘了阿
只要您是 Microsoft Windows System 的 Administrator 使用者
你就可以用 /as sysdba 經由 SQL*Plus 登入成為 sysdba 重設它

If you have forgotten the SYS SYSTEM password for an Oracle Database Server,
you can reset it by logging in to Windows as Administrator
then connecting to Oracle as sysdba by logging in /as sysdba use SQL*Plus

Example:

SQL*Plus: Release 11.2.0.1.0 Production on 星期日 2月 27 22:47:47 2011

Copyright (c) 1982, 2010, Oracle. All rights reserved.

輸入使用者名稱: /as sysdba

連線到:
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 system identified by oxoxox;

已更改使用者.

SQL>