Databases

Online PostgreSQL Query Tool

Use the PostgreSQL query tool to practice readable SQL against a small sample dataset. The page is optimized for SELECT, GROUP BY, ORDER BY and simple joins, with output shown as a table so beginners can connect query clauses to results. It is intentionally separate from production databases: no credentials, writes or persistent storage are used.

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Online compiler

PostgreSQL workspace

File: anku-postgresql-example.sqlSandbox run

PostgreSQL editor

File: anku-postgresql-example.sql

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Standard input

Output

Success

Ready.

Returns order_count and total_revenue grouped by status.

How to use this PostgreSQL query tool

  • Open the PostgreSQL starter code or choose another example from the dropdown.
  • Add stdin only if the example reads from standard input.
  • Review stdout, errors, compile output or table results in the output panel.
  • Copy the code or download it as a .sql file when the result looks right.

PostgreSQL features

  • PostgreSQL-style SELECT practice
  • Safe sample dataset
  • Table output
  • Aggregation examples
  • Copy and download .sql files
  • Related MySQL and MongoDB tools

Common use cases

  • Practice GROUP BY
  • Teach revenue summaries
  • Compare SQL dialects
  • Debug query logic before real data

PostgreSQL example code

Aggregate orders by status.

-- Safe sample tables: customers, orders, products
SELECT
  status,
  COUNT(*) AS order_count,
  SUM(total) AS total_revenue
FROM orders
GROUP BY status
ORDER BY total_revenue DESC;

Sample output

Returns order_count and total_revenue grouped by status.

Common PostgreSQL errors

  • Column must appear in GROUP BY: When aggregating, group every selected non-aggregate column.
  • Unsupported write query: Use SELECT queries in the safe sample runner.
  • Wrong table name: Use customers, orders or products from the sample dataset.

Related compilers

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Write and test Python snippets with stdin, readable output and beginner-friendly examples.

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Compile Java Main-class examples with stdin support and practical debugging guidance.

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Online JavaScript Compiler

Run JavaScript snippets in the browser with console output, errors and downloadable code.

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Frequently Asked Questions

Is this connected to PostgreSQL?

No. It is a safe sample runner for learning query patterns without a live database connection.

Can I practice GROUP BY?

Yes. The starter query and examples include grouping and aggregate functions.

Can I use PostgreSQL-specific functions?

The safe runner supports a focused subset for examples. Use a real sandbox database for advanced dialect features.

Does the page store my query?

No. The editor state stays in the browser during your session.

Can I download SQL?

Yes. The download button saves the current query as a .sql file.