And I haven't completely finished my explanation of it! <a href="http://jimkeener.com/posts/explain-pg" rel="nofollow">http://jimkeener.com/posts/explain-pg</a><p>I love EXPLAIN, it's such an amazing tool for figuring out how to get a query to run faster. It's much more detailed than MySQL's and often one of the reasons I list when people ask if they should checkout/switch to pg (which you should!)