oracle 11g dblink配置

关于DBLINK的概念在本文中不再赘述，本文主要介绍DBLINK的创建。

1.创建环境描述
本文将在两台操作系统为红帽5.5版本、装有Oracle 11g的虚拟机中进行DBLINK的创建以及测试工作。

2.主机配置

1）配置主机tnsname.ora文件
[oracle@ENMOEDU schema]$ cd /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/
[oracle@ENMOEDU admin]$ vi tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ENMOEDU =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.80.10)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ENMOEDU)
    )
  )
FRANK =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.80.27)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = FRANK)
    )
  )

将要连接的数据库的信息写入主机的tnsname.ora文件中。

3.在主机上创建DBLINK

1）本文中以hr用户为例，首先授予hr用户权限：
SYS@ENMOEDU > grant create public database link,create database link to hr;

Grant succeeded.

2）创建DBLINK
SYS@ENMOEDU > conn hr/oracle
Connected.

HR@ENMOEDU > create database link hrlink connect to hr identified by oracle using 'FRANK';
Database link created.

4.测试

1)在被连接的数据库上的hr用户下的EMPLOYEES表中，删除一行数据
SQL> select EMPLOYEE_ID,FIRST_NAME from EMPLOYEES
  2  where  FIRST_NAME='Pat';

EMPLOYEE_ID FIRST_NAME
----------- --------------------
        202 Pat

SQL> DELETE FROM EMPLOYEES 
  2  where FIRST_NAME='Pat';

1 row deleted.

SQL> commit;

Commit complete.

2)在主机上查看被连接数据库的hr用户下EMPLOYEES表
HR@ENMOEDU > select EMPLOYEE_ID,FIRST_NAME from EMPLOYEES@hrlink
  2   where  FIRST_NAME='Pat';

no rows selected

HR@ENMOEDU > select EMPLOYEE_ID,FIRST_NAME from EMPLOYEES@hrlink
  2  where  FIRST_NAME='Shelley';

EMPLOYEE_ID FIRST_NAME
----------- --------------------
        205 Shelley

至此，DBLINK创建成功。

Frank
2014.04.08

--To be continued--