ORA-12514: TNS:监听程序当前无法识别连接描述符中请求的服务详解数据库

PL/SQL连接Oracle数据库的时候 报 ORA-12514: TNS:监听程序当前无法识别连接描述符中请求的服务 错误

本例原因：

安装Oracle时一般默认实例都是orcl，发现有人不按套路出牌，改了名字，如图

解决方法：

在Oracle安装目录 找到listener.ora文件 路径为 D:/oracle/product/11.2.0/dbhome_1/NETWORK/ADMIN

(根据自己情况查找) 修改：

# listener.ora Network Configuration File: D:/oracl/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = CLRExtProc)
  (ORACLE_HOME = D:/oracle/product/11.2.0/dbhome_1)
  (PROGRAM = extproc)
  (ENVS = EXTPROC_DLLS=ONLY:D:/oracle/product/11.2.0/dbhome_1/bin/oraclr11.dll )
  )
  (SID_DESC =
  (GLOBAL_DBNAME = JTW)
  (ORACLE_HOME = D:/oracle/product/11.2.0/dbhome_1)
  (SID_NAME = JTW)
  )
  )

LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
  )
  )

红色部分为新添加内容，JTW为监听的实例名

然后修改(添加)instantclient_11_2/network/admin/tnsnames.ora

MyOracle = 

 (DESCRIPTION = 

 (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) 

 (CONNECT_DATA = 

 (SERVER = DEDICATED) 

 (SERVICE_NAME = jtw) 

 )

重启Oracle监听

参考资料：链接

作者：itmyhome

原创文章，作者：Maggie-Hunter，如若转载，请注明出处：https://blog.ytso.com/4105.html