1 Background

Database systems are fundamental for the information society. Every day, an inestimable amount of data is produced, collected, stored and processed: online shopping, sending emails, using social media, or seeing your physician are just some of the day-to-day activities that involve data management. A properly working database management system is hence crucial for a smooth operation of these activities. In this chapter, we introduce the principles and properties that a database system should ful fill. Database management systems and their components as well as data modeling are the other two basic concepts treated in this chapter.

1.1 Database Properties

As data storage plays such a crucial role in most applications, database systems ...

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