C:\Users\Jasmine>net start oracleserviceorcl
服务正在启动或停止中，请稍候片刻后再试一次。
C:\Users\Jasmine>sqlplus /nolog
SQL*Plus: Release 11.2.0.1.0 Production on Tue Feb 19 09:26:31 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> conn / as sysdba
Connected.
SQL> startup
ORA-01081: cannot start already-running ORACLE - shut it down first
现在可以正常试用
SQL> create table test(new varchar2(25));