12/13 Oracle连接报错

1.oracle连接错误
the network adapter could not establish the connection
参考：
http://blog.sina.com.cn/s/blog_6ac4c6cb0101axoe.html

2.执行请求的操作时遇到错误:

Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

供应商代码 12505

sid有问题（改成xe）