oracle 11gR2数据库,1521端口未开启和sid问题，导致报错，错误代码：ora:12505，解决办法，

1、进入oracle数据库的安装目录找到这个路径：D:\app\ELONG\product\11.2.0\dbhome_1\NETWORK\ADMIN，我在本地D盘安装；

修改该：listener.ora和tnsnames.ora为下面：

2、listener.ora，修改如下，注意：HOST修改为本机的IP地址。

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# listener.ora Network Configuration File: D:\app\ELONG\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:\app\ELONG\product\11.2.0\dbhome_1)

(PROGRAM = extproc)

(ENVS = "EXTPROC_DLLS=ONLY:D:\app\ELONG\product\11.2.0\dbhome_1\bin\oraclr11.dll")

)

(SID_DESC=

(GLOBAL_DBNAME=ORCL)

(ORACLE_HOME=D:\app\ELONG\product\11.2.0\dbhome_1)

(SID_NAME=orcl)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.27.247)(PORT = 1521))

)

)

ADR_BASE_LISTENER = D:\app\ELONG

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3、tnsnames.ora修改如下，注意：HOST修改为本机IP地址。

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# tnsnames.ora Network Configuration File: D:\app\ELONG\product\11.2.0\dbhome_1\network\admin\tnsnames.ora

# Generated by Oracle configuration tools.

ORACLR_CONNECTION_DATA =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

)

(CONNECT_DATA =

(SID = CLRExtProc)

(PRESENTATION = RO)

)

)

ORCL =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.27.247)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = orcl)

)

)

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