Practice SQL Online in a Real Playground

SQLTest.online Playground lets you write, run, and troubleshoot SQL directly in your browser. Switch between MariaDB, MySQL, PostgreSQL, SQLite, Microsoft SQL Server, Oracle, and Firebird to test syntax differences, validate ideas, and prepare for interviews, coursework, or real application work.

Why use this SQL playground

• Run SQL instantly without installing a database server on your machine.
• Compare how common SQL statements behave across multiple database engines from one interface.
• Prototype queries, debug errors, and learn SQL faster with immediate feedback.

Supported databases

The playground currently includes MariaDB, MySQL, PostgreSQL, SQLite, Microsoft SQL Server, Oracle, and Firebird. That makes it useful both for vendor-specific practice and for cross-database verification before moving a query into production code.

Best for learning, debugging, and query validation

Use this page to practice SELECT statements, joins, aggregations, subqueries, filtering, sorting, and window functions. It is a practical place to refine a query before you add it to an application, dashboard, migration, or report.