Ryan Stephens is an entrepreneur who has built his career and multiple IT companies around SQL, data, and relational databases. He has shared his knowledge and experience with organizations, students, and IT professionals all over the world. Two of the companies he has co-founded, Perpetual Technologies, Inc. (PTI), and Indy Data Partners, have provided expert database and IT services to large-scale government and commercial clients for more than 25 years. Ryan has authored several books for Pearson; some of his books have been translated and published internationally. Additionally, Ryan has worked for large organizations and has consulted within the areas of SQL, database design, database management, and project management. He designed and taught a database management program for Indiana University-Purdue University in Indianapolis and currently teaches online SQL and database classes for Pearson Education.