The objective of this constructive research was to create a low-budget customer database for small-sized tourism agency to optimize company’s data management, working routine, customer service, and to gain knowledge from customer data to create a competitive advantage, and to meet the provisions of General Data Protection Regulations of the European Union. The theoretical part of the thesis was supported by various sources like books, articles, regulations from the law, the Internet and the author’s personal experience. The raw data for the empirical part of the thesis was provided by the partner company. The empirical part was naturally divided into data processing, the creation of a database, and following data analysis. As a result...