创建数据库链接

-- Create database link 
create public database link DB_LINK
  connect to server identified by weisheng219
  using '(DESCRIPTION = (ADDRESS_LIST =
         (ADDRESS= (PROTOCOL = TCP)
                   (Host =10.61.183.5)(Port = 1521)))
                   (CONNECT_DATA = (SID = wfjc219)
                   (SERVER = DEDICATED)))';