MySQL Studio - Persistent SQL Database in Your Browser
Every SQL tutorial starts the same way: create a table, insert some rows, then write your query. If you are using a typical online SQL runner, you repeat that setup every single time because nothing is saved.
OneCompiler Studio for MySQL gives you a real database that persists between sessions. Create your tables today, query them tomorrow.
What is included
A MySQL Studio workspace is a dedicated MySQL server instance running in the cloud. Not a browser-side SQLite shim, not an emulator. Real MySQL.
Here is what you get:
- 50 MB of storage, up to 20 tables
- Data persists for 7 days on the free tier
- Pre-loaded datasets ready to query: Employees, USA Zip Codes, Times Person of the Year, and Cats in Movies
- Workspace starts in about 10 seconds
The pre-loaded datasets are worth calling out. They range from simple (a flat employee table) to moderately complex (zip code data with geographic fields). You can start writing JOINs, subqueries, and GROUP BY statements without spending your first 15 minutes on DDL.
Editor vs. Studio
OneCompiler has two separate tools for MySQL, and they are built for different things.
The editor at onecompiler.com/mysql runs SQL in a stateless environment. Each execution starts fresh. It is fast, simple, and great for verifying that a query does what you think it does.
Studio at onecompiler.com/studio/mysql gives you a persistent database. Tables you create stay around. Data you insert is still there when you come back. You get a proper environment for working through multi-step problems.
Use the editor when you want to check syntax. Use Studio when you want to build something.
Things this is good for
Learning SQL from scratch. Most beginners struggle not with SQL itself but with the setup. Installing MySQL, configuring users, creating databases. Studio removes all of that. You open a browser tab and start writing queries.
Working through exercises. If you are following a SQL course or textbook, you can build up your tables and data across multiple sessions. No more re-creating everything at the start of each chapter.
Interview prep. Practice window functions, CTEs, self-joins, whatever the job requires. The Employees dataset works well for the kind of hierarchical and aggregate queries that show up in interviews.
Quick prototyping. You are designing a schema for a new feature. Instead of sketching it on paper, create the tables, load some test data, and try your queries. Faster feedback than theorizing.
Limits
50 MB and 20 tables is enough for learning and prototyping but not for anything production-related. The 7-day window means you should not rely on it for long-term storage. But for what it is designed for, the constraints are generous.
Try it
Go to OneCompiler Studio for MySQL. You will have a running MySQL instance with sample data in about 10 seconds. No accounts, no installs, no configuration files.