今天我重装win8系统，安装oracle之后默认账号密码无法登陆。
环境: win8 oracle11g
C:\Users\JianYong>sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on 星期四 9月 24 21:55:36 2015
Copyright (c) 1982, 2010, Oracle. All rights reserved.
ERROR:
ORA-01031: insufficient privileges
