本文深入探讨了数据库链接创建及使用方法，并提供了具体的SQL查询示例。
配置一
create database link dcmdb connect to dcmdb identified by dcmoptr using 'zbcdb3' ;
select * from tabname@dcmdb where 1=1;
配置二
create database link to_bylw3 connect to bcp_fj identified by bcp123 using '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.172)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = szqdyxbf8)
)
)';
create database link dcmdb connect to dcmdb identified by dcmoptr using 'zbcdb3' ;
select * from tabname@dcmdb where 1=1;
配置二
create database link to_bylw3 connect to bcp_fj identified by bcp123 using '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.172)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = szqdyxbf8)
)
)';
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