Postgresql and web module sample code

[meysam_b]

Hi friends 

I'm implementing a web application by NXG web module 

In this project I need connect to database and insert data run queries and actions like these.

But I find out that nxg web module can not connect to database directly. So we need web services. In my studies I realized postgresql is a solution. But I need a sample code or other benefit data for start and understanding . I don't know anything about postgresql. Anyone can help me? 

Best regards.