创建dblink

1:create public database link db_link_a
connect to uu IDENTIFIED BY uu
using '127.0.0.1/utf8'
;

2:

CREATE DATABASE LINK company_link_06
CONNECT TO usera IDENTIFIED BY usera
USING '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.16)(PORT = 1521)))
(CONNECT_DATA = (SERVICE_NAME = ora11)
)
)';

3：查看db_link的源码

SELECT dbms_metadata.get_ddl('DB_LINK', 'LLL_DDCH.REGRESS.RDBMS.DEV.US.ORACLE.COM')
FROM dual;

4:查询DATABASE LINK的名字

SELECT owner,object_name
FROM dba_objects
WHERE object_type LIKE 'DATABASE%';