ORACLE创建db_link

CREATE  PUBLIC database link data_exchange_server
CONNECT TO collect IDENTIFIED BY collect
using '(DESCRIPTION =
        (ADDRESS_LIST =
                 (ADDRESS = (PROTOCOL = TCP)(HOST = 132.33.254.47)(PORT = 1521))
        )
        (CONNECT_DATA =
              (SID = oratest)
              (SERVER = DEDICATED)
        )
      )'