create database link CDRjinan
connect to usernameidentified by "password"
using ‘(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = HLHT3) ) )‘;
因为此处有BUG 密码必须加双引号
原文：http://www.cnblogs.com/sirius-snow/p/4377504.html