How data scientists work with PostgreSQL from Python (and how to write queries that don’t break at scale)


 

In this article, learn how PostgreSQL powers data science workflows, including query execution, performance optimization, indexing, data retrieval, and more.

There’s a part of the data science stack that rarely gets discussed. Not because it’s unimportant, but because it’s already been decided long before you arrive. Somewhere upstream, engineers chose a relational database. In many cases, they chose PostgreSQL. And, since it often becomes a ‘background’ system, it’s very easy to underestimate its impact.

It’s seen as just a place to pull data from before the “real work” begins in Python. It sits beneath notebooks, pipelines, and dashboards, rarely drawing