Is the SQL Playground safe to use? Does my data leave the browser?

Yes, it is completely safe. The SQL Playground runs SQLite compiled to WebAssembly entirely in your browser. Your queries and data never leave your machine and are never sent to any server. The database exists only in memory and is discarded when you close or refresh the page.

What SQL features are supported in the SQL Playground?

The playground supports the full SQLite SQL dialect, including CREATE TABLE, INSERT, SELECT, UPDATE, DELETE, JOINs (INNER, LEFT, CROSS), subqueries, aggregate functions (COUNT, SUM, AVG, MIN, MAX), GROUP BY, HAVING, ORDER BY, LIMIT, UNION, CASE expressions, CTEs (WITH), window functions, and more. You can run multiple statements separated by semicolons.

Can I import my own data or export query results?

You can create your own tables and insert data using standard SQL CREATE TABLE and INSERT statements. Query results can be exported as CSV files with one click using the Export CSV button. The playground also comes with a pre-loaded sample database containing employees and departments tables so you can start querying immediately.

SQL Playground

Run SQL queries directly in your browser using SQLite compiled to WebAssembly. Comes with a pre-loaded sample database (employees & departments). Supports CREATE, INSERT, SELECT, JOINs, aggregates, multi-statement queries, and more. Your data never leaves your browser.

Loading SQLite engine...

query.sql 0 chars

Results 0 rows

Query results will appear here after you run a query.

Ready

Sample Database Schema

departments

id INTEGER PRIMARY KEY
name TEXT
location TEXT
budget REAL

employees

id INTEGER PRIMARY KEY
first_name TEXT
last_name TEXT
email TEXT
department_id INTEGER FK → departments.id
salary REAL
hire_date TEXT
is_active INTEGER

Online SQL Query Editor & Sandbox

This SQL Playground runs a full SQLite database engine in your browser using WebAssembly. There is no server, no signup, and no data leaves your machine. Write SQL queries, create tables, insert data, and see results instantly. The pre-loaded sample database includes employees and departments tables so you can start practicing SQL immediately.

Features

Full SQLite engine running in WebAssembly — CREATE TABLE, INSERT, SELECT, UPDATE, DELETE, and more
JOINs: INNER JOIN, LEFT JOIN, CROSS JOIN with full ON/USING clause support
Aggregate functions: COUNT, SUM, AVG, MIN, MAX with GROUP BY and HAVING
Advanced SQL: subqueries, CTEs (WITH clause), CASE expressions, window functions, UNION
Multi-statement support: run multiple SQL statements separated by semicolons in a single execution
Pre-loaded sample database with employees and departments tables (15 employees, 5 departments)
Export results as CSV for use in spreadsheets or other tools
Execution time measurement to benchmark your queries
12 built-in example queries covering SELECT, JOINs, aggregates, subqueries, CTEs, and more
Query history saved to localStorage for easy recall
Keyboard shortcuts: Ctrl+Enter run, Ctrl+Shift+C copy, Ctrl+L clear
100% client-side — your queries and data never leave your browser

How It Works

When you load this page, the SQLite database engine (compiled to WebAssembly via sql.js) is downloaded and initialized in your browser. A sample database with employees and departments is created in memory. When you click Run Query, your SQL is parsed and executed entirely within the browser's WebAssembly sandbox. Results are rendered as interactive tables. The database persists in memory as long as the page is open — you can create tables, modify data, and run complex queries across multiple executions.

Use Cases

Learning SQL — practice SELECT statements, JOINs, and aggregates with a real database
Interview preparation — rehearse SQL coding challenges with instant feedback
Quick prototyping — test table schemas and query logic before deploying to production
Data analysis — create tables, insert data, and run analytical queries without setting up a database
Teaching — demonstrate SQL concepts with live, interactive examples

SQL Playground

Sample Database Schema

Query History

Online SQL Query Editor & Sandbox

Features

How It Works

Use Cases

Frequently Asked Questions

SQL Playground

Sample Database Schema

Query History Clear history

Online SQL Query Editor & Sandbox

Features

How It Works

Use Cases

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