The thesis deals with the newest area of databases that are NewSQL database.
The aim of the thesis is to describe NoSQL and NewSQL databases and com-
pare them with relational database. NewSQL database is using the same
language SQL as relational databases, with ACID support for transactions
same as a relational database, while NoSQL database follow the CAP the-
orem, in accordance with the principle of BASE. NewSQL database also as
NoSQL database are horizontally scalable. The rst chapter is an introduc-
tion to the study, followed by an introduction to databases and description
of relational databases. The third and the fourth chapter presents NoSQL
and NewSQL database. We presented what these bases, their characteristics,
categorize and describe examples of NewSQL databases. We made a compar-
ison between the relational, NoSQL and NewSQL databases. The last two
chapters describe the preparation of test databases and testing respectively
measurement runtime of databases. The nal section presents conclusions
about the studied databases and makes some predictions about their future.