create database link DBL_XE
connect to "FS_51" identified by "FS_51" using ‘
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(HOST = 192.168.3.48)
(PORT = 1521)) )
(CONNECT_DATA =
(SERVICE_NAME = XE)
) )‘;
原文：http://www.cnblogs.com/lyf681888/p/4028182.html