Build a Real Sales API Endpoint (FastAPI + PostgreSQL)

Published: 20 February 2026
on channel: MarcMan Media

▶️ Part of the Building a Production-Style FastAPI Backend (PostgreSQL-First) series
📘 Watch the full playlist here: • Building a Production-Style FastAPI Backen...
💻 GitHub repository for this series: github.com/marcmanmedia/northwind-lite-fastapi

In this episode of the FastAPI Backend Series, we build our first real business endpoint — employee sales performance — using PostgreSQL views and FastAPI.

This isn’t a toy example.

We connect to a production-grade PostgreSQL database (Northwind-lite) hosted in the cloud and expose a /sales endpoint that returns aggregated employee revenue data.

What You’ll Learn:
✔ Why would database views belong in production systems
✔ How to create a PostgreSQL aggregation view
✔ How to expose raw SQL safely using SQLAlchemy
✔ How FastAPI dependency injection works
✔ How to return structured JSON from database queries

Architecture Principle:
The database computes.
The API exposes.
The client consumes.

We move business logic closer to the data layer using a PostgreSQL view and keep our FastAPI layer clean and intentional.

Tech Stack:
FastAPI
PostgreSQL
SQLAlchemy
Pydantic (coming next episode)
VS Code
Cloud-hosted PostgreSQL (Neon)

Next Episode:
In Episode 5, we introduce Pydantic response models and transform our endpoint into a fully defined API contract.

If you're building real backend systems and want production-level architecture patterns — this series is for you.

#FastAPI #PostgreSQL #BackendDevelopment #PythonAPI #SoftwareArchitecture #SQLAlchemy #RESTAPI #WebDevelopment

On this page of the site you can watch the video online Build a Real Sales API Endpoint (FastAPI + PostgreSQL) with a duration of hours minute second in good quality, which was uploaded by the user MarcMan Media 20 February 2026, share the link with friends and acquaintances, this video has already been watched 52 times on youtube and it was liked by 2 viewers. Enjoy your viewing!

38,835

566