With the current emphasis on "Big data", NoSQL databases have surged in popularity. These databases are claimed to perform better than SQL database. This trend created a lot of excitement throughout the community of web application developers and among data management developers and researchers. But it also created a lot of debate. The author's aim to independently investigate the performance of some NoSQL and SQL databases in the light of key-value stores along with features as Overall time, Transactional integrity and time. A bank application supporting these basic operations is designed and implemented using all the databases tested.