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

前两天把9i换成了10g，装完之一直用着挺好的，昨天还在用，今天不知道怎么登陆时出现错误

“ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务”

 

解决办法，在listener.ora中加入红色部分内容

# listener.ora Network Configuration File: c:/oracle/product/10.1.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = c:/oracle/product/10.1.0/db_1)
      (PROGRAM = extproc)
    )
  
   (SID_DESC =
      (GLOBAL_DBNAME = ORCL)
      (ORACLE_HOME = c:/oracle/product/10.2.0/db_1)
      (SID_NAME = ORCL)
    )

  )

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