I gained some knowledge about PostgreSQL by attending a short course on Query Tuning. I found Postgres to be very useful.

I am an expert in MySQL and Microsoft SQL, but I haven’t had the opportunity to delve into Postgre SQL yet. The mentioned course helped me with that. What is PostgreSQL? PostgreSQL, also known as Postgres, is an open-source relational database management system (RDBMS) that has gained significant popularity among developers and businesses. It was first developed at the University of California, Berkeley, in the 1980s and has since evolved into a robust and feature-rich database solution. PostgreSQL stands out from other RDBMS choices due to its emphasis on extensibility and adherence to standards. This implies that users can effortlessly expand its functionality by incorporating custom data types and operators or coding their own functions in different programming languages. PostgreSQL