Oracle异常：ORA-12518: TNS: 监听程序无法分发客户机连接―解决方案

问题：

SQL> connect sys/password @RAOASYS as sysdba
ERROR:
ORA-12518: TNS: 监听程序无法分发客户机连接

Solution：

检查是否启动了oracle实例。

C:Documents and SettingsAdministrator>net start OracleServiceRAOASYS
The OracleServiceRAOASYS service is starting.....
The OracleServiceRAOASYS service was started successfully.