Jun 212013
 
select *
from   driving_site_hint;

DESCRIPTION
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Instruction to the optimizer on which database
owns the query when using db links
A suggestion that you need motoring lessons

The driving site hint can be particularly useful when you're accessing several tables across a 
database link, allowing all the joins to take place on the remote site. It also comes in handy 
for those people who seem in capable of following the basic rules of the road ;)