Free SQL Runner Online

Write and execute SQL queries online using an in-memory SQLite database. Create tables, insert data, and run complex queries instantly.

Write and execute SQL queries online with FlexyPdf's free SQL runner, powered by SQLite. No database server needed — each execution creates a fresh in-memory SQLite database, runs your SQL script, and returns the results instantly. The Monaco editor provides complete SQL syntax highlighting and formatting. Create tables, insert data, write complex SELECT queries with JOINs, GROUP BY, ORDER BY, subqueries, aggregate functions, and more. Results are displayed in the output console as formatted text. The SQL runner is perfect for learning SQL, testing database queries, exploring SQLite syntax, or verifying query logic before deploying to production. Every session starts with a clean slate — no data persists between executions.

How to Use SQL Runner

Write SQL Statements

Type or paste SQL into the Monaco editor. Start with CREATE TABLE and INSERT statements to populate data, then write SELECT queries to retrieve it. Click "Example" for a complete demo script.

Click "Run SQL"

Press Run SQL. Your script runs against a fresh in-memory SQLite database. CREATE, INSERT, UPDATE, DELETE, and SELECT statements are all supported.

View Query Results

Results from SELECT statements appear as text output in the console. SQL errors are shown in red with line numbers. Edit and re-run as many times as needed.

Features

SQLite In-Memory Database

Each run creates a brand-new in-memory SQLite database. Fully supports SQL92 plus SQLite-specific extensions like AUTOINCREMENT and REAL data type.

Full SQL Support

Supports CREATE, INSERT, SELECT, UPDATE, DELETE, DROP, JOINs, subqueries, aggregate functions (SUM, AVG, COUNT, MIN, MAX), GROUP BY, ORDER BY, HAVING, and LIMIT.

Monaco SQL Editor

Professional code editor with SQL keyword highlighting, auto-complete for common SQL keywords, and clean formatting.

Isolated Execution

Runs in a Docker container. No data persists between runs. Each execution is isolated, safe, and starts fresh.

Benefits of Using SQL Runner

Completely Free

Use SQL Runner without any cost, limits, or hidden fees. No premium plans needed.

No Installation

Works directly in your browser. No software downloads or plugins required.

100% Private

Your files and data are processed locally. Nothing is uploaded to external servers.

Works Everywhere

Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.

No Sign-Up

Start using the tool immediately. No account creation or email verification.

Always Available

Access this tool 24/7 from anywhere in the world, on any device.

Frequently Asked Questions

The runner uses SQLite, which supports standard SQL with some variations. Most SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, and JOIN syntax is compatible.

No — the runner uses an isolated in-memory SQLite database. There is no connection to external databases or servers.

No — each execution starts with a completely fresh empty database. Data from previous runs does not persist.

Yes — write as many SQL statements as you need in the editor. They are all executed in sequence against the same in-memory database.

SQLite has limited support for triggers (yes, supported) but does not support stored procedures. Basic trigger functionality works.