在三个实例oracle之间创建数据库链接

Question

如何在三个实例之间建立数据库链接？ 例如，我有名为 orcl、orcl1、orcl2 的数据库如何链接它们？ 谢谢

Answer 1

这些是下面的 SQL，可能对你有帮助:)

在数据库 ORCL：

CREATE DATABASE LINK db_link_orcl1
CONNECT TO orcl1_user_name IDENTIFIED BY orcl1_user_password 
USING 'localhost:1521/orcl1';

CREATE DATABASE LINK db_link_orcl2
CONNECT TO orcl2_user_name IDENTIFIED BY orcl2_user_password 
USING 'localhost:1521/orcl2';

在数据库 ORCL1：

CREATE DATABASE LINK db_link_orcl
CONNECT TO orcl_user_name IDENTIFIED BY orcl_user_password 
USING 'localhost:1521/orcl';

CREATE DATABASE LINK db_link_orc2
CONNECT TO orcl2_user_name IDENTIFIED BY orcl2_user_password 
USING 'localhost:1521/orcl2';

在数据库 ORCL2：

CREATE DATABASE LINK db_link_orcl
CONNECT TO orcl_user_name IDENTIFIED BY orcl_user_password 
USING 'localhost:1521/orcl';

CREATE DATABASE LINK db_link_orcl1
CONNECT TO orcl1_user_name IDENTIFIED BY orcl1_user_password 
USING 'localhost:1521/orcl1';