Dr. Mark L. Gillenson has been practicing, researching, teaching, writing, and, most importantly, thinking, about data and database management for over twenty-five years, split between working for the IBM Corporation and being a professor in the academic world. While working for IBM, he designed databases for IBM's corporate headquarters, consulted on database issues for some of IBM's largest customers, taught database management at the prestigious IBM Systems Research Institute in New York, and conducted database seminars throughout the United States and on four continents. In one such seminar, he taught introduction to database to an IBM development group that went on to develop one of IBM's first relational database management system products, SQL/DS.

Frank Miller has nearly 30 years experience designing, developing, and delivering technical training materials. For 20 of those years, SQL language database management systems have been an area of special interest and expertise. During that time he has written books and other training materials that are used by various schools and professional organizations in the United States and around the world.