Oracle 8i communicate with oracle 9i

I'm planning to do data purging which transfer some old data in date range from oracle 8i to oracle 9i and then delete the old in oracle 8i.
as i know, to communicate between database in same server, we need to use "Database Link"
but if communicate with different server? any query or snytax to do it? or what steps i need to follow? Is it difficult to do it?
Thanks..

You can create your database link like this (no need to have an entry in the file
tnsnames.ora)
CREATE DATABASE LINK "<SID>.WORLD" CONNECT TO "<USER>"
IDENTIFIED BY "<PWD>"
USING '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = <host of remote server>)(PORT = <database listener port>))
(CONNECT_DATA =
(SID = <sid>)
Hope this helps
Mike

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