ora-12514 tns 監聽程序當前無法識別連接描述符中請求的服務

我是在使用Navicat for Oracle 連接本地Oracle服務的時候，報 ora-12514 tns 監聽程序當前無法識別連接描述符中請求的服務 異常

首先我是查看配置

D:\ysstech\soft\oracle\oracle11\product\11.2.0\dbhome_1\NETWORK\ADMIN     listener.ora　這個是我服務的安裝目錄

# listener.ora Network Configuration File: D:\ysstech\soft\oracle\oracle11\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:\ysstech\soft\oracle\oracle11\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\ysstech\soft\oracle\oracle11\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )--新添加的
  (SID_DESC = (SID_NAME = orcl) (ORACLE_HOME = D:\ysstech\soft\oracle\oracle11\product\11.2.0\dbhome_1) (SID_NAME = ORCL) )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = pc-PC)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = D:\ysstech\soft\oracle\oracle11

　　發現缺少了對相關服務名的監聽，所以添加了對ORCL的監聽

     然后重啟Oracle服務，連接正常