Practice SQL
Run SELECT, INSERT, UPDATE, DELETE, JOIN, GROUP BY, and aggregation examples in the browser.
Online SQL compiler
Run SQL queries online with a browser-based editor.
Use PostgresGUI's online SQL editor as a free SQL compiler: write queries, create sample tables, insert rows, and inspect results without installing a local database.
Use sample data
Create tables and test queries without touching a production database.
Move to PostgresGUI
When you are ready for real PostgreSQL databases on Mac, use the native desktop client.
SQL compiler or SQL editor?
People often search for an online SQL compiler when they want an online query editor with a database behind it. SQL is interpreted by a database engine rather than compiled like a traditional app, but the workflow is the same: write a query, run it, and inspect the result.