In-browser SQLite real-time execution β write SQL, see results instantly
Zero Dependencies Β· Works Offlineπ SQL Editor
ποΈ Database Schema
π Execution History
What Can the SQL Playground Do?
The SQL Playground is a free online tool that lets you write and execute SQL statements directly in your browser. Powered by SQLite (sql.js WebAssembly version), it supports standard SQL syntax with built-in sample databases. Write SQL and see query results instantly β no database installation or configuration needed. All data is processed locally in your browser with no server uploads.
Core Features
- Real-time SQL Execution: Powered by sql.js (SQLite WebAssembly), supporting full SQL syntax including SELECT/INSERT/UPDATE/DELETE/CREATE
- Built-in Sample Databases: Three sample databases (Employees, Products, Students) loadable with one click
- Schema Viewer: Real-time display of current database table structures and column types
- Multi-format Export: Copy results as text, download as CSV, or export the entire database as SQL scripts
- SQL Import: Paste SQL scripts or drag and drop .sql files to import
- Execution History: Automatically saves the last 5 SQL executions for easy review
How to Use
1. Click "Employees"/"Products"/"Students" to load a sample database, or write CREATE TABLE statements to create your own.
2. Enter SQL statements in the editor. Multi-line editing is supported.
3. Click "Run" or press Ctrl+Enter to execute. Results appear instantly in the table below.
4. Check "Database Schema" to see current table and column information.
5. Click "Export SQL" to save the current database, and "Import SQL" to restore it later.
Use Cases
Case 1: Developer Quick SQL Testing
Need to verify SQL logic during development? No need to start a local database β write and test directly in the browser.
Case 2: Student SQL Learning
Practice SELECT/JOIN/subquery syntax in database courses with instant result feedback to deepen understanding.
Case 3: Interview SQL Practice
Prepare for technical interviews by practicing classic SQL problems and verifying your solutions.
Case 4: Data Analyst Ad-hoc Queries
Import data and use SQL to filter and analyze without installing specialized tools.
Case 5: Technical Demo
Demonstrate SQL syntax and query effects live during tech talks or training sessions.
Extended Knowledge
SQLite is the world's most widely used embedded database engine, created by D. Richard Hipp in 2000. It features zero configuration, no server, and single-file storage β used by Android, iOS, Chrome, Firefox, and billions of devices. sql.js is SQLite compiled to WebAssembly, enabling it to run in browsers with near-native performance. SQLite supports most of SQL-92 including transactions, triggers, views, and subqueries, but lacks RIGHT/FULL OUTER JOIN and some window functions. For learning and everyday query testing, SQLite is more than sufficient.
β FAQ
What SQL dialect is supported?
SQLite syntax, compatible with most standard SQL (SELECT/INSERT/UPDATE/DELETE/CREATE/JOIN/subqueries/aggregate functions, etc.).
Is data persisted?
Data is stored in browser memory and resets on refresh. Export SQL scripts to save locally and import them later.
Can I create my own tables?
Yes. Use CREATE TABLE to create custom tables, INSERT to add data, and SELECT to query.
Is my data uploaded to a server?
No. This tool uses sql.js (SQLite WebAssembly). All SQL execution happens locally in your browser. Your data never leaves your device.
What SQL features are supported?
SELECT/INSERT/UPDATE/DELETE/CREATE TABLE/DROP TABLE/JOIN/subqueries/aggregate functions/GROUP BY/ORDER BY/LIMIT/UNION and other SQLite core features.
Can I import external data?
Yes. Paste SQL scripts or drag and drop .sql files. Built-in sample databases are also available.
Can I export query results?
Yes. Copy results as text, download as CSV, or export the entire database as SQL scripts.
Feedback: dexshuang@google.com