The reviews for the 1st and 2nd editions confirm: Finally, a book that truly guides the reader in an understandable way and leads them to their goal with certainty. This is achieved through a consistent focus on examples and easy comprehensibility. Additionally, the reader is supported by an online service. Step by step, the stages from analyzing the reality to be represented in the data model to structuring the database are illustrated. A particular advantage is the illustrative application examples from various business contexts and commercial areas, for which detailed solutions have been added in the 3rd edition. The book is suitable for both students and practitioners, especially for computer scientists, business informatics specialists, and business economists.