Dblink operation in Oracle

1、 establish dblink

 create public database link dblinkname
connect to user identified by passwd
using '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = ip)(PORT = 1521)))
(CONNECT_DATA = (SERVICE_NAME = servicename)))';

The parameters can be customized
dblinkname - dblink Remote connection name
user - Remote database user name
passwd - Remote database password
IP - Remote database IP Address
1521 - Oracle Default port
servicename - Remote database service name

2、 Inquire about dblink

select owner,object_name from dba_objects where object_type='DATABASE LINK';-- Query only permissions and dblink name

select * from dba_db_links;-- Inquire about dblink All the information about , Include permissions ,dblink name , user name ,host, Creation time

3、 Access test
select * from [email protected] Name

4、 Delete dbilnk

drop public database link dblink name ;-- Delete permission is public Of dblink

drop database link dblink name ;-- Delete private dblink