MariaDB Online Compiler | Free Online Compiler

SQL

CREATE TABLE inventory (id INTEGER PRIMARY KEY, item TEXT, stock INTEGER);
INSERT INTO inventory (item, stock) VALUES ('Keyboard', 12), ('Mouse', 30), ('Monitor', 6);
SELECT * FROM inventory WHERE stock > 10;

In-browser runner uses SQLite for demo SQL execution.

Results

What Is the MariaDB Online Compiler?

A free browser-based SQL editor for writing and running MariaDB-compatible queries without installing any software. Practice SELECT, INSERT, UPDATE, DELETE, JOINs, subqueries, and aggregate functions with instant table-formatted results. MariaDB is a community-driven fork of MySQL, and most MySQL syntax works here as well.

How It Works

The compiler loads a SQL engine (sql.js compiled to WebAssembly) directly in your browser. Write SQL in the editor, click Run, and see results displayed as formatted tables. The engine executes standard SQL syntax compatible with MariaDB conventions including JOINs, GROUP BY, HAVING, and subqueries. No server connection or MariaDB installation is required.

Step-by-Step Example

Create a table using CREATE TABLE with columns and data types.
Insert sample rows with INSERT INTO statements.
Run a SELECT query with a WHERE clause to filter results.
Use a JOIN to combine data from multiple tables.
View the formatted table results in the output panel.

Use Cases

Learning MariaDB and MySQL-compatible SQL syntax interactively
Practicing JOINs, subqueries, and aggregate functions
Testing queries before running them on production MariaDB databases
Preparing for database interviews and SQL certification exams
Prototyping table designs and validating data relationships

Limitations & Notes

This is a browser-based simulation, not a real MariaDB server instance.
Storage engine selection (InnoDB, Aria, etc.) is not applicable in the browser.
All data resets when the page is refreshed; there is no persistent storage.
Some MariaDB-specific features like stored procedures and triggers are not supported.
Performance depends on your browser and device; not intended for production use.

Frequently Asked Questions

Is this a real MariaDB server?

No, it simulates MariaDB SQL execution in the browser. No real MariaDB server connection is involved.

Is this compatible with MySQL syntax?

Yes, MariaDB follows similar SQL syntax to MySQL. Most MySQL queries will work in this compiler.

Are storage engines supported?

Storage engine selection is not applicable in this browser-based environment. Queries execute using an in-memory SQL engine.

Do JSON functions work?

Basic JSON function support is available, though some MariaDB-specific JSON operations may be limited.

Is my data persistent?

No. All tables and data reset when you refresh the page. Each session starts with a fresh database.

Can I use CREATE TABLE?

Yes, you can create tables with standard SQL data types and constraints.

Are window functions supported?

Basic window function support is available, including ROW_NUMBER, RANK, and aggregate window functions.

What MariaDB version does this follow?

The compiler follows general MariaDB SQL syntax conventions. It is not tied to a specific server version.

MariaDB Compiler