SQL — Indexes

Overview

Learn Indexes in SQL with a clear explanation and a practical example.

What you'll learn

• What Indexes means
• When to use it
• How it works in practice
• A copy‑paste example

Syntax

SELECT ...

Example

SELECT * FROM users ORDER BY id DESC LIMIT 10;

Notes

• Test the example in the Playground.
• Start simple, then expand.

Mistakes

• Mixing up the syntax.
• Not testing the output.

Try: Open the Playground: /en/playground/sql