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SQL Schema & Query Playground — Design, Edit & Run Queries Visually

Design a relational database schema visually, edit table structure directly, and write and run SQL queries against simulated in-browser execution — no database server to install, useful for prototyping a schema or practicing SQL without any real infrastructure.

How to use SQL Schema & Query Playground

1. Design your table schema visually.
2. Populate sample data.
3. Write and run SQL queries.
4. See results and refine your schema or query.

Frequently asked questions

Is this a real database, or simulated?

Queries run against an in-browser simulated execution engine — good for prototyping schema design and practicing SQL syntax, not a substitute for testing against your actual production database engine's specific behavior.

Can I design foreign key relationships?

Yes — table relationships including foreign keys can be defined visually as part of the schema design.

What SQL syntax does it support?

Standard SQL covering common SELECT, JOIN, WHERE and aggregate query patterns used across most relational databases.

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