Have data? Here's how Unix can help
bernie_michalik 1100004GGT Visits (1887)
This article by Greg Rada has lots of good tips on how to use Unix and Unix commands to slice and dice it the way you need to in order to get the results you want. It's not just for DB2 or Oracle experts, either. Greg provides examples that work with straightforward (though potentially large) CSV files.
Greg has some other good advice on his site too: don't forget to poke around.