Explains any code snippet line by line for beginners
Beginner12h1–2
Next.jsLLMCode editor
15/20SQL Playground with Real Datasets
Practise SQL on real datasets right in the browser.
Beginner10h1 person17/20 fit
Build SQL Playground with Real Datasets for students learning sql in ~10h with 1 person. Stack: DuckDB + Next.js.
Why it wins: Zero-setup learning.
Build flow
01 · Problem
SQL tutorials use toy tables and need setup.
02 · Solution
Run DuckDB in the browser with curated datasets, challenges and instant result checking.
03 · Build
- 1Load DuckDB WASM
- 2Add datasets
- 3Write challenges
- 4Check answers
04 · Demo
Solve a challenge on a public dataset.
MVP checklist
- Browser database
- Datasets
- Challenges
- Result checks
Tech stack
| Tech | Role | |
|---|---|---|
| DuckDB | In-process analytics SQL | Data |
| Next.js | Frontend + API routes | Web |
Reference repos
Open-source projects you can build on. Links checked 2026-10-31.
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