EARTH WEEK
Go paperless and save 40% on eligible eBooks, 70% on video now through April 26. Shop the sale.
JOHN J. PATRICK is a computer consultant and software developer specializing in relational database technology. He teaches SQL Fundamentals and other database courses at the University of California, Berkeley Extension, and has over 20 years of experience in software development at Bank of America, Chevron, Kaiser Permanente, and other leading firms.