Intro

Intro

Intro is a core part of MySQL. In this case file you'll learn what it is, why it matters, and how to use it in real code.

Understanding intro well means you can read other people's MySQL code with confidence, and avoid the most common beginner mistakes in this area.

Key points:

• What intro means in the context of MySQL
• A minimal example you can run or read in the playground on the right
• A common mistake to avoid when working with intro

-- MySQL: Intro
SELECT *
FROM agents
WHERE clearance_level > 0;

Tip: Try changing a value in the code on the right and re-running it — small experiments are the fastest way to build real intuition for intro.