Traditional relational database management systems are being challenged by the increasing requirements of new application types. This king of applications usualy need to work with large amounts of complex type of data. If for a long time open source relational databases like MySQL represented the basis for Web applications nowadays this well known RDBMS faces a lot of challenges from the alternative database providers. The market where MySQL activates has be opened to cloud database providers.This databases are called NoSQL- Not only SQL and they represent non relational databases.The development of NoSQL and NewSQL and the new features of this type of databases are theatening the MySQL monopol. In this paper we are analyzing the characteristics of NoSQL databases, stressing the advantages and disadvantages compared to the relational model and showing how can these databases can be used to help the organization.In addition, this paper presents a short analysis on the features of MongoDB, in order to give a practicat example on the switch between SQL and NoSQL and the ease in development with the latest kind of database.