oracle dblink创建

oracle 11G R2

实例1：  192.168.1.211           实例名:feng

实例2：  192.168.1.212           实例名：wan

现在要在实例2，上面做dblink,查询实例1上面的数据

实例1的oracle管理员用户system及密码oracle

在实例2上面修改

vim /data/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora

增加

REFENG =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.211)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = feng)
    )
  )

然后sqlplus / as sysdba,创建dblink

create public database link feng CONNECT TO system IDENTIFIED BY oracle USING ‘REFENG‘;

删除dblink
drop public database link feng;

查看已创建的dblink
select owner,object_name from dba_objects where object_type=‘DATABASE LINK‘;

查询数据

select * from 用户.表@dblink名

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oracle dblink创建

原文：http://fengwan.blog.51cto.com/508652/1689588