Oracle不同数据库通过database link访问
Oracle 不同服务器数据库之间的访问 默认在本机操作 访问远程 *.*.*.*库
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Oracle不同数据库通过database link访问
[日期:2011-10-18] 来源:Linux社区 作者:qingwangyoucao [字体:]
Oracle 不同服务器数据库之间的访问 默认在本机操作 访问远程 *.*.*.*库
1.创建数据库链接
示例:
CREATE PUBLIC DATABASE LINK orcl211 CONNECT TO 用户名identified by 密码 using '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *.*.*.*)(PORT = 1521))
)
(CONNECT_DATA =
(service_name=ORCL)
)
)';
参数对应描述:
CREATE PUBLIC DATABASE LINK 数据库链接名
CONNECT TO 用户名
identified by 密码
using '连接说明'
其中,连接说明必须为如下格式_也可取tnsnames.ora中配置的服务名,但要注意tnsnames.ora中也需满足下面格式,否则连接会不成功:
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *.*.*.*)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME=ORCL服务名)
)
)
2.访问链接数据库中的对象的语法 如访问 orcl211中的edubur用户下的ts_staff_info
示例:
select * from edubur.ts_staff_info@orcl211;
参数对应描述:
select * from 用户名.表名@远程数据库链接名
3.查看所有已创建的数据库链接名
select owner, db_link from dba_db_links;
ower db_link
PUBLIC ORCL211.REGRESS.RDBMS.DEV.US.ORACLE.COM
4.删除数据库链接名
drop public DATABASE LINK ORCL211.REGRESS.RDBMS.DEV.US.ORACLE.COM
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