ORA 12154：TNS：無法解析指定的連接標識符

 問題：

 

ORA 12154：TNS：無法解析指定的連接標識符

安裝了ORACLE10G，配置本地NEI服務名，測試連接不通過 顯示   
正在連接...ORA-12541: TNS: 無監聽程序
測試未成功。

使用PL/SQL Developer登陸，提示ORA 12154：TNS：無法解析指定的連接標識符
LISTEN與ORACLE服務已經全部啓動了，這是爲什麼？？

解決方法：

服務器莫名其妙的報這個錯，之前一直正常，從google獲取解決方案，解決之，記錄如下：

 1. Open the ""<OracleHome>/network/admin/listener.ora" file in the host,and you will see:
   SID_LIST_LISTENER =
   (SID_LIST =
     (SID_DESC =
       (SID_NAME = PLSExtProc)
       (ORACLE_HOME = D:/oracle/product/10.2.0/db_1)
       (PROGRAM = extproc)
     )
   )
  2. Add the following lines after the 7th line in the above
            (SID_DESC =
       (GLOBAL_DBNAME = ORACLE)
       (ORACLE_HOME = D:/oracle/product/10.2.0/db_1)  
       (SID_NAME = ORACLE)
      )
  3. At last the content of the file become to the following section:
 SID_LIST_LISTENER =
   (SID_LIST =
     (SID_DESC =
       (SID_NAME = PLSExtProc)
       (ORACLE_HOME = D:/oracle/product/10.2.0/db_1)
       (PROGRAM = extproc)
     )
     (SID_DESC =
       (GLOBAL_DBNAME = ORACLE)
       (ORACLE_HOME = D:/oracle/product/10.2.0/db_1)  
       (SID_NAME = ORACLE)
      )
   )
  4. Save the file and restart the TNSListener service in the host. That's OK!