ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务

1.检查Oracle数据库主服务和监听服务是否打开

2.检查listener.ora文件是否正确配置

SID_LIST_LISTENER =

  (SID_LIST =

    (SID_DESC =

      (SID_NAME = PLSExtProc)

      (ORACLE_HOME = G:\oracle\product\10.2.0\db_1)

      (PROGRAM = extproc)

    )

   (SID_DESC =

    (GLOBAL_DBNAME = ORCL)

    (ORACLE_HOME = G:\oracle\product\10.2.0\db_1)  

    (SID_NAME = ORCL)

    )

  )

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

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

    )

  )

 

3.查看日记记录是否已满
打开我的电脑-管理-事件查看器--应用程序，右键-----正常登-“清除所有事件”，