链接oracle的sqlplus出现协议适配器错误

1.如果连接出现协议适配器错误如下



如果开启service和listener均无效，则很有可能是oracleService+你之前设置的SID也要开启没否则报错





2.SQLDeveloper出现12514连接异常



  

如果你之前设置过sid则要更改sid名称，如果蓝色部分为你的主机名

# listener.ora Network Configuration File: E:\Oracle10g\network\admin\listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER =

  (SID_LIST =

    (SID_DESC =

      (SID_NAME = PLSExtProc)

      (ORACLE_HOME = E:\Oracle10g)

      (PROGRAM = extproc)

    )
   (SID_DESC =

    (GLOBAL_DBNAME = ORCL)

    (ORACLE_HOME = E:\Oracle10g)

    (SID_NAME = ORCL)

    )

 )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL =
IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL =
TCP)(HOST = onest)(PORT = 1521))
    )
  )