For a similar tool for Sybase, see dbschema.pl1. I wrote the original version of this tool many years ago, but it's still as useful, letting you reverse engineer an entire Sybase database...
1. It seems that this site is currently down, however.
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
Results (575 votes). Check out past polls.