首先装好Oracle企业版或者客户端精简版。之后要修改你的的tnsnames.ora文件，来增加数据库。
我的ORACLE实例是ORACLE1，放在D:\oracle\ 目录下。我的IP地址是 192.168.1.102
修改如下：
添加：
DEMO =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.102)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORACLE1)
)
)
这样就把一个远程的数据库添加到本机的客户端中了。然后打开PL/SQL DEV 软件。在工具->首选项中修改：
Oracle主目录名：D:\oracle\
OCI库：D:\oracle\ora92\bin\oci.dll
这样设置之后，就可以通过PL/SQL DEV来访问远程的Oracle数据库了。
附上最原始的tnsnames.ora文件
# TNSNAMES.ORA Network Configuration File: D:\oracle\ora92\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLE1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = VKP1W8IQZW4QTSX)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = Oracle1)
)
)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = VKP1W8IQZW4QTSX)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
)
)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)