Actual PostgreSQL
Commands run against a sandbox PostgreSQL instance.
Free PostgreSQL Playground Online
A lite SQL playground on real Postgres. Practice JOINs, CTEs, and window functions—no local install.
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Sql
About this editor
A lite SQL playground on real Postgres. Practice JOINs, CTEs, and window functions—no local install.
Write SELECT, JOIN, CREATE TABLE, CTEs, and window functions against real PostgreSQL—not SQLite dressed up as PG. Sanity-check interview SQL, EXPLAIN plans, and migrations before staging. Sandbox sessions may reset; save titled snippets for queries you teach or reuse.
Key features
Results below the editor
Run a query and read the output in the panel underneath.
Skip local setup
No Docker image, no cloud account, no PostgreSQL install on your machine.
Practice queries
Try CRUD, joins, or shell syntax before an interview or a prod change.
Save examples
Bookmark a useful query by saving it with a title.
Sandbox only
Data can reset between sessions. Not for production workloads.
Getting started
- 1Write SQL
Start from the users/orders JOIN template, or paste your own queries.
- 2Run
Result grids or errors appear in the output panel.
- 3Try DDL
CREATE TABLE, indexes, and inserts work inside the sandbox.
- 4CTEs & windows
Practice WITH clauses, ROW_NUMBER, and EXPLAIN before prod.
- 5Save
Keep a permalink for queries you reuse or share.
Sample queries
Users + orders JOIN
CREATE TABLE users (
id SERIAL PRIMARY KEY,
name TEXT NOT NULL
);
CREATE TABLE orders (
id SERIAL PRIMARY KEY,
user_id INT REFERENCES users(id),
total NUMERIC(10,2)
);
INSERT INTO users (name) VALUES ('Ada'), ('Bob');
INSERT INTO orders (user_id, total) VALUES (1, 42.00), (1, 18.50), (2, 9.99);
SELECT u.name, SUM(o.total) AS spent
FROM users u
JOIN orders o ON o.user_id = u.id
GROUP BY u.name;CTE + window function
WITH ranked AS (
SELECT user_id, total,
ROW_NUMBER() OVER (PARTITION BY user_id ORDER BY total DESC) AS rn
FROM orders
)
SELECT * FROM ranked WHERE rn = 1;EXPLAIN a JOIN
EXPLAIN ANALYZE
SELECT u.name, o.total
FROM users u
JOIN orders o ON o.user_id = u.id
WHERE o.total > 10;Common questions
Is this PostgreSQL compiler free?
Yes. No payment and no account required for a quick run. Sign in if you want saves tied to your profile.
Do I need to install anything?
No. Code runs on Codeground servers in a sandbox. Just open the page.
What PostgreSQL version runs here?
Postgres in a sandbox — sessions may reset.
Can I share my code?
Save with a title to get a permalink, or share the playground URL as-is.
Works for interviews?
Yes. Share a ground link, or use interview mode for a live shared editor.
Multiple files?
This page is for single-file snippets. Use a cloud workspace for full projects.
Will my code still be here tomorrow?
Anonymous sessions can reset. Save with a title (and sign in) for a stable link.
Why use this instead of installing locally?
Good for quick tests, learning, and sharing a snippet. For large offline work, a local IDE still wins.
Is this an online PostgreSQL IDE or playground?
A browser playground with syntax highlighting and one-click Run — run PostgreSQL online without a full local install. Cloud workspaces cover multi-file projects.
Is there a free PostgreSQL playground with no install?
Yes. Run Postgres SQL online for free—no psql, Docker, or postgres.app required for practice.
PostgreSQL playground vs DBeaver?
DBeaver connects to your real databases with full admin tooling. This is a lite SQL playground for learning JOINs, CTEs, and EXPLAIN without standing up a server.
Can I practice JOINs, CTEs, and window functions?
Yes. Multi-table JOINs, WITH clauses, ROW_NUMBER / RANK, and aggregations all run on real Postgres.
Can I use EXPLAIN here?
Yes. Run EXPLAIN or EXPLAIN ANALYZE on sandbox queries to inspect plans before you touch staging.
Does the sandbox reset?
Sessions can reset. Not production storage—save titled snippets for lasting query templates.
Good for SQL interview prep?
Yes. Drill JOINs, CTEs, and window functions in a free online Postgres playground before take-homes.