如何创建Oracle的DBLINK

Oracle的DBLINK是一种高效的系统集成方式，很便捷的打通多套应用系统的数据库打通。下面介绍一下查询，创建，删除DBLINK的方法。

1，查询DBLINK

select * from dba_db_links;

2，创建DBLINK

create  database link todm
      connect to DM identified by DM
      using ' (DESCRIPTION =
   (ADDRESS_LIST =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 172.19.4.122)(PORT = 1521))
   )
   (CONNECT_DATA =
     (SERVER = DEDICATED)
     (SERVICE_NAME = orcl)
   )
 )';

3，删除DBLINK

DROP PUBLIC DATABASE LINK TODM;