Select from remote DB, insert into another remote DB

Does any one know how I can use sqlplus to connect to a remote db, and use the result to insert in another remote db?
sort of like
insert into remoteConnectionB.tableA values
(select one, two, three from remoteConnectionA.tableA)
Some background
I think that I have a character encoding problem with some data in our production DB. I'm allowed to query the DB, but I can't run my application against it and it seems just doing a copy and paste (in windows xp) doesn't recreate the problem.
I'm hoping that having a DB to DB connection will put the 'bad' data into my testing DB so I can play around with it.
Can I have an export/dump/pump done? Yes, but then I have to track down another guy, ask him to do it blah blah blah, I'm just hoping to get running on this problem ASAP; and, it would be interesting to know how to do this.
Thanks for any help

Use database links:
create database link src connect to user1 identified by pwd1 using 'connectstring1';
create database link trg connect to user2 identified by pwd2 using 'connectstring2';
insert into mytable@trg select * from mytable@src;Max
http://oracleitalia.wordpress.com

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