Students and career changers receive a guide with this book that enables them to create their own databases. Using a continuous example, the fundamental advantages of database applications are explained, and the design process is developed step by step. In the expanded new edition, "recipes" at the end of each section summarize this process, and exercise sections help to test and deepen the understanding of what has been learned. The content covers database design, initial steps, relationships between data, database optimization, queries: searching, linking, calculating, modifying, SQL statements, DBMS and 3-tier architecture, transaction concepts, and data security. The target audience includes IT enthusiasts and career changers. The authors are Prof. Dr. Helmut Eirund from Bremen University of Applied Sciences and Ullrich Kohl from Harz University of Applied Sciences, Wernigerode.