Oracle 常见问题汇总

1、Listener refused the connection with the following error

安装之后如果遇到如下问题
状态: 失败 -测试失败: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

解决办法：
1、首先使用SQL Plus用管理员账户登录：sys/manager as sysdba
输入select * from v$instance; 当前使用的SID查看

修改\product\12.1.0\dbhome_1\NETWORK\ADMIN下的listener.ora文件：

原始文件：

# listener.ora Network Configuration File: D:\Oracle\tree\product\12.1.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\Oracle\tree\product\12.1.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\Oracle\tree\product\12.1.0\dbhome_1\bin\oraclr12.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = D:\Oracle\tree\product\12.1.0\dbhome_1\log

修改之后的文件：

# listener.ora Network Configuration File: D:\Oracle\tree\product\12.1.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\Oracle\tree\product\12.1.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\Oracle\tree\product\12.1.0\dbhome_1\bin\oraclr12.dll")
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ORCL)
      (ORACLE_HOME = /app/oracle/oracle/product/10.2.0/db_1)
      (SID_NAME = ORCL)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\Oracle\tree\product\12.1.0\dbhome_1\bin\oraclr12.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = D:\Oracle\tree\product\12.1.0\dbhome_1\log

之后再使用SQL Developer可视化界面登录，修改对应的SID即可：