Tutorsbot

Online SQL Compiler

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-- Online SQL compiler — run SQLite queries in the browser.
-- Tables are pre-seeded for you: employees, departments, salary,
-- projects, attendance — see the Tables panel on the left for
-- columns and rows. Just write SELECT / JOIN / GROUP BY queries.
.headers on

SELECT e.name AS employee, d.name AS department, s.amount AS salary
FROM employees e
JOIN departments d ON e.dept_id = d.id
JOIN salary s ON s.emp_id = e.id
ORDER BY s.amount DESC;

SQL is the universal language for databases. Run SQLite online — practice CREATE TABLE, SELECT, JOIN, GROUP BY, aggregate functions, and subqueries interactively.

Free Online SQL Playground — SQLite in Your Browser

Run SQL online without installing MySQL, PostgreSQL, or SQLite locally. This playground executes your queries against an in-memory SQLite database, so you can prototype a JOIN, test a window function (`ROW_NUMBER()`, `LAG()`, `RANK()`), rehearse a SQL interview question, or share a runnable query with a teammate — all from your browser. The result set renders as a sortable, filterable table in the Output panel.

SQL Playground for Data Analysts and Backend Developers

Common use cases: prototype a complex JOIN against a sample schema before adding it to a production query, test a window-function partition against sample rows, rehearse a SQL-specific interview question (correlated subqueries, GROUP BY with HAVING, recursive CTEs) in front of a hiring panel, or share a runnable query with a teammate. The playground reports both SQLite syntax errors with line/column hints and the result set. For a guided path beyond playground experimentation, see Tutorsbot's SQL Training and Data Analytics Training programmes.

Which SQL Features Are Supported?

SQLite with the full ANSI SQL core plus the most-used extensions: window functions (`ROW_NUMBER`, `RANK`, `DENSE_RANK`, `LAG`, `LEAD`, `FIRST_VALUE`, `LAST_VALUE`), common table expressions (CTEs, including recursive), JSON1 functions (`json_extract`, `json_each`), FTS5 full-text search, generated columns, UPSERT (`ON CONFLICT DO UPDATE`), and the `WITH` clause for materialised hints. Standard SQL is fully supported: SELECT (with subqueries, derived tables, set operations UNION/INTERSECT/EXCEPT), INSERT/UPDATE/DELETE, transactions, indexes, views, and triggers.

Is the Online SQL Playground Free?

Yes — 100% free for evaluation, learning, and interview preparation. No account, no captcha, no per-day limit. For production features (persistent schemas across sessions, multi-statement transactions, larger result sets, scheduled jobs), see Tutorsbot's SQL Training and Data Engineering Training programmes.

What You Can Do With This Online SQL Playground

The compiler runs SQLite with the full SQLite feature set: `SELECT`, `INSERT`, `UPDATE`, `DELETE`, `CREATE TABLE`, `CREATE INDEX`, `CREATE VIEW`, `CREATE TRIGGER`, `WITH` (CTEs including recursive), window functions (`OVER (PARTITION BY … ORDER BY …)`), `json_extract`, `json_each`, `json_tree`, the entire `date/time` function family, and `UPSERT` (`ON CONFLICT … DO UPDATE`). The playground auto-creates a fresh in-memory database per run — your `CREATE TABLE`s reset every time, which makes it perfect for testing schema migrations or query plans in isolation. Common table expressions, subqueries, joins (INNER, LEFT, CROSS, FULL OUTER), and `GROUP BY … HAVING` all work. The shell-style commands `.headers on`, `.mode column`, and `.nullvalue NULL` are also supported so you can pretty-print results without leaving the editor.

Why use the SQL online compiler?

  • SQLite — runs ANSI SQL with extensions like JSON1, FTS5, and window functions
  • Standard SQL: SELECT, JOIN, GROUP BY, HAVING, CTEs, subqueries
  • Window functions and aggregate functions supported
  • Schema can be defined with CREATE TABLE inline
  • Result set rendered as a queryable table in the Output panel
  • Persistent workspace with autosave to localStorage

Frequently Asked Questions

Is the SQL online compiler free?
Yes — Tutorsbot's SQL compiler is completely free. No account required, no installation, and no usage limits.
Do I need to install SQL?
No. The SQL compiler runs entirely in your browser. No runtime, no SDK, no PATH configuration. Open the page and start coding.
Is my SQL code saved between sessions?
Yes — your code autosaves to your browser's local storage so you can resume where you left off. You can also generate a shareable URL.
Can I share SQL code with others?
Yes. Click the Share button to copy a URL that encodes your script. Anyone with the link can open and run it instantly — no account required on their end.
Is the SQL compiler safe to use?
Absolutely. Every program runs in an isolated sandbox. Your local system is never exposed to the executed code, and nothing is persisted after the execution window.