See the article at the following URL.
The idea of this project is to make it possible to load the same data set into PostgreSQL so that the same analysis can be done with a powerful SQL dialect, for comparison with MongoDB.
See the PostgreSQL articles using this project at the following URLs:
http://tapoueh.org/blog/2014/02/17-aggregating-nba-data-PostgreSQL-vs-MongoDB http://tapoueh.org/blog/2014/02/21-PostgreSQL-histogram