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| title: SQL Query Playground | |
| emoji: 🦆 | |
| colorFrom: indigo | |
| colorTo: gray | |
| sdk: static | |
| pinned: true | |
| license: mit | |
| short_description: Real SQL against DuckDB WASM — runs in your browser | |
| # SQL Query Playground | |
| Write and run **real SQL against a seeded warehouse** — DuckDB compiled to | |
| WebAssembly, executed entirely in your browser. Nothing is uploaded, no server | |
| exists: the database, the engine and the results all live on your machine. | |
| - **55 tested templates** — window functions, cohort queries, funnel metrics, | |
| date arithmetic — every template is also executed in CI against the same data. | |
| - Schema browser for the four-table warehouse (1,000 customers, 5,000 orders, | |
| 12,663 line items), seeded deterministically. | |
| - Ctrl+Enter to run; query timing and row counts shown on every execution. | |
| Not a simulation: every query is parsed, typed and executed by a real DuckDB | |
| engine. Errors surface as data — the way production pipelines treat failures. | |
| - Code + template library: [sql-query-builder on GitHub](https://github.com/Reaver1000/sql-query-builder) | |
| - Built by [David Buchan](https://reaver1000.github.io) — AI, automation and data work | |