ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务

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Oracle数据库连接失败

该问题的处理

：

找到Oracle的安装路径，每个人安装路径不同；

打开安装路径\app\product\11.2.0\dbhome_1\NETWORK\ADMIN

用记事本打开文件listener.ora

原文件如下：

# listener.ora Network Configuration File: E:\win10\360downno\app\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 = E:\win10\360downno\app\product\11.2.0\dbhome_1)      (PROGRAM = extproc)      (ENVS = "EXTPROC_DLLS=ONLY:E:\win10\360downno\app\product\11.2.0\dbhome_1\bin\oraclr11.dll")    )  )LISTENER =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))    )  )ADR_BASE_LISTENER = E:\win10\360downno\app

修改文件如下：

# listener.ora Network Configuration File: E:\win10\360downno\app\product\11.2.0\dbhome_1\network\admin\listener.ora# Generated by Oracle configuration tools.SID_LIST_LISTENER =  (SID_LIST =    (SID_DESC =      (GLOBAL_DBNAME = ORCL)      (ORACLE_HOME = E:\win10\360downno\app\product\11.2.0\dbhome_1)      (SID_NAME = ORCL)    )    (SID_DESC =      (SID_NAME = CLRExtProc)      (ORACLE_HOME = E:\win10\360downno\app\product\11.2.0\dbhome_1)      (PROGRAM = extproc)      (ENVS = "EXTPROC_DLLS=ONLY:E:\win10\360downno\app\product\11.2.0\dbhome_1\bin\oraclr11.dll")    )  )LISTENER =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))    )  )ADR_BASE_LISTENER = E:\win10\360downno\app

修改后就OK了

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