ORACLE建DBLINK远程连接数据库

drop database link dblinkname;
-- Create database link 
create database link dblinkname
  connect to username IDENTIFIED BY password
  using '(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = ip)(PORT = port))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = xxx)
    )
  )';

username是用户名  password是密码