Content Summary : Abstract This paper compares MySQL and PostgreSQL and identifies the differences in both of these popular database systems. Features A features comparison between MySQL and PostgreSQL is no easy feat. There is a fairly broad feature set with varying levels of support amongst the two management systems. The best way to identify the strengths and weaknesses is to compare the feature set we've come to expect from database systems. Data Storage PostgreSQL is fairly straightforward, using Postgre Storage System as the only storage mechanism. MySQL, on the other hand, offers a multitude of database storage systems, such as InnoDB and DBD. While this offers a greater choice of features, it can be a source of confusion and increased learning curve.