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12 graded SQL projects with automatic tests, made by Claude Code

They wanted real practice to learn SQL. Claude Code built 12 projects that get harder step by step, each with tests that check the answers. A few lessons needed fixing; overall it worked fantastically.

Done withClaude CodeSpotted· by HN user idontwantthis· Oct 15, 2026

Result Worked fantastically, with a few fixes

“I had it create 12 projects of graded difficulty with automated tests.”
From the source: Hacker News · 2026-08-01

Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.

What they did

Asked Claude Code to create practice material for learning SQL: 12 projects of graded difficulty, each with automated tests to check the answers.

How it went

Some lessons needed revising along the way, but overall it worked fantastically.

Try it yourself with Claude Code
Create a course to teach me [skill, for example SQL] as a set of practice projects from beginner to advanced. Each project needs a short brief, starter files, a sample dataset and automated tests that check my solution. Don't include the solutions. When I finish one, review my work and adjust the next project to my level.

A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.

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