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Ranking > Categories

Number of systems per category, April 2014

DB-Engines lists 216 different database management systems, which are classified according to their database model (e.g. relational DBMS, key-value stores etc.).
This pie-chart shows the number of systems in each category. Some of the systems belong to more than one category.

Ranking scores per category in percent, April 2014

This chart shows the popularity of each category. It is calculated with the popularity (i.e. the ranking scores) of all individual systems per category. The sum of all ranking scores is 100%.

Popularity changes per category, April 2014

The above chart shows the historical trend of the categories' popularity. For each month the best three systems per category are chosen and the average of their ranking scores is calculated. In order to allow comparisons, the initial value is normalized to 100. For most of the categories the trend starts with January 2013 but search engines and multivalue DBMS are only collected since February 2013 and May 2013.





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