Rick van der Lans is the managing director of R20/Consultancy, based in The Netherlands. He is an independent analyst, consultant, author, and internationally acclaimed lecturer specialising in data warehousing, business intelligence, big data, and database technology. For many years, he has served as the chairman of the annual European Enterprise Data and Business Intelligence Conference. Rick writes for various websites, including TechTarget and BeyeNETWORK, and has authored many white papers. His popular books, including Introduction to SQL (Addison-Wesley Professional, 2006) and Data Virtualisation for Business Intelligence Systems (Morgan Kaufmann, 2012), have been translated into numerous languages with more than 100,000 copies sold.