In one of your answers to a question on tkprof and explain plans, you wrote, "I strongly recommend you get hold of a tuning book and go over them."
Can you recommend a book (and class) on Oracle SQL optimization? I am particularly interested in learning how to interpret the explain plan, what to look for, et cetera.
Oracle High-Performance SQL Tuning by Donald K. Burleson. Oracle Press, ISBN 0-07-219058-2