The last years have seen exciting developments in the areas of Databases. When you book hotels and flights, use ATM machines, buy something in a shop, pick some packet that arrived by mail, go to the bank, search for an apartment, register a new apartment, or use the web, computerized data management is always present. This is because most human activities are systematically recorded and make use of data based information systems to help search, organize and manage. Your latest medical imaging records are also stored or indexed in a database. This is a textbook about databases and developing database applications that teaches the foundations of data management models, SQL and data application development. With the knowledge acquired, you will be able to design and develop databases and database applications.