This invaluable learning tool provides an understanding of the industry-standard query language SQL. Using an appropriate mix of underlying mathematical formalism and hands-on activities with numerous examples, the book is designed to help users grasp the essential concepts of relational database query languages. The book provides a complete presentation of the relational data model, relational algebra, domain and tuple relational calculus and SQL, with case studies and Microsoft assess. For individuals in computer science, information services and industrial engineering interested in gaining an understanding of the foundations of industry SQL.