1.登陆 D:\app\Administrator\product\11.2.0\dbhome_1\BIN>sqlplus /nolog SQL*Plus: Release 11.2.0.1.0 Production on 星期二 3月 3 12:19:01 2020 Copyright (c) 1982, 2010, Oracle. All rights reserved. SQL> conn as sys/oracle #格式错误,根据下面提示修改登陆参数 SP2-0306: 选项无效。 用法: CONN[ECT] [{logon|/|proxy} [AS {SYSDBA|SYSOPER