Oracle12c 通过IP访问数据出现ORA-12505错误

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本文详细介绍了如何解决在尝试连接Oracle数据库时遇到的ORA-12505错误，步骤包括检查本地监听服务状态、确保Oracle服务已启动、编辑listener.ora文件、重启相关服务及重新连接数据库。

错误代码：Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

1、确认自己本地监听服务已经开启

2、确认自己的oracle服务已经全部启动

3、找到自己的oracle安装地址文件 G:\oracle\product\12.2.0\dbhome_1\network\admin

编辑文件 listener.ora

# listener.ora Network Configuration File: G:\oracle\product\12.2.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = G:\oracle\product\12.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:G:\oracle\product\12.2.0\dbhome_1\bin\oraclr12.dll")
)
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = G:\oracle\product\12.2.0\dbhome_1)
(SID_NAME = ORCL)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.102.177)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)

ADR_BASE_LISTENER = G:\oracle\product\12.2.0\dbhome_1\log

DIAG_ADR_ENABLED_<LISTENERNAME> = OFF

增加加粗的代码。

4、重启红色框框两个服务

5、打开sqldeveloper重新连接自己的数据库就可以了

参考：https://liyf155.iteye.com/blog/1538209