listener does not currently know of service requested in connect descriptor

TNS:listener does not currently know of service requested in connect descriptor

解决方法如下

打开 C:\oracle\product\10.1.0\Db_1\NETWORK\ADMIN 文件夹下的 listener.ora文件

里面代码如下，把红色部分代码加上

重启 Listener服务。即可。

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
      (PROGRAM = extproc)
    )
 
 (SID_DESC =
      (SID_NAME = orcl)
      (ORACLE_HOME = c:\oracle\product\10.1.0\Db_1)
    )

  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
      )
    )
  )