oracle 创建DBLink

drop database link LINK_NAME.US.ORACLE.COM;
-- Create database link
create database link LINK_NAME.US.ORACLE.COM
  connect to ZZY identified by ZZY
  using '(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = CHINA-5BF855638)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )';