如何确定 客户端连接Oracle时的端口号、全局数据库名等信息

一般情况下端口号是1521，但如果安装Oracle时更改了端口号的话，就需要到Oracle服务器上查讯端口号。可以通过tnsnames.ora文件读取数据库的信息。

可以看到类似如下的内容：

# tnsnames.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

ORACLE11G =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = oracle11g)

)

)

ORCL =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = orcl.localdomain)

)

)

~

-- INSERT --

HOST= 就是主机地址（如果是写的主机名，可以查看/etc/hosts文件中查看主机名对应的IP地址）

POST= 就是数据库开放的端口