About

Unnested is a SQL learning platform built around fundamentals. Most resources teach you what to type. We focus on why it works — the mechanics of NULL handling, join behavior, window functions, and everything else that causes bugs and blank stares when it matters.

The format is direct: concept questions that expose exactly how the language behaves, followed by practice problems that run against a real database. No gamification, no filler. Answer, see why, move on.

We're a small team based in Pennsylvania, building tools we wished existed when we were learning.

Questions or suggestions? team@unnested.io