This thesis examines the emergence of NoSQL databases by considering the reasons that led to it their creation and the key factors that influenced their wide application. The focus of the first chapter is on getting to know NoSQL databases. The important ones will be explored characteristics that NoSQL provides compared to traditional SQL systems. Development NoSQL technologies and their application form the second part of that chapter, while the final part of the chapter highlights some of the differences that SQL databases have with NoSQL databases. In the second chapter, one of the most famous NoSQL databases will be analyzed - Apache to Cassandra. The key concepts of the technology of this base will be discussed and provide insight into the architecture and objects it uses to store and manage data. The third chapter contains the beginning of practical work in the database. The steps will be studied installations, configurations and data entry, show how to create a database and use it opportunities through familiarization with CQL (Cassandra Query Language). In the fourth chapter we focus on analytical aspects. The selected data source will entered into the created database and will be approached from an analytical perspective, in order to learned information related to various points of interest from the data source. It will also be displayed additional tools that can be used with Cassandra for better analysis.