Adding Real-World PostgreSQL Functions to Northwind-Lite

Описание: ▶️ Part of the Real-World PostgreSQL with Northwind-Lite series
📘 Watch the full playlist here:    • Building a Real PostgreSQL Project in the ...  
💻 SQL scripts for this series: github.com/marcmanmedia/northwind-lite-series
☁️ Cloud PostgreSQL using Neon (https://www.neon.com)

Episode overview

In this episode, we take the next step by writing real-world, server-side PostgreSQL functions using the Northwind-Lite database.

These functions encapsulate business logic directly in the database, allowing us to calculate order totals, summarize customer purchases, and reuse complex SQL across queries, reports, and applications.

We walk through each function step by step, explain why it exists, and then verify the results using real data loaded in earlier episodes. This approach keeps logic close to the data and prepares the database for analytics, reporting, and production use.

Who this is for

This video assumes basic SQL knowledge and is intended for developers and data engineers who want practical experience using PostgreSQL functions in real-world scenarios.

Topics covered in this episode:

Why use server-side functions in PostgreSQL

Creating the get_order_total function

Creating the get_orders_with_totals function

Creating the get_customer_sales function

Verifying function logic using real data