When you're deep in a data problem, the last thing you want is to hesitate over INNER JOIN vs LEFT JOIN. SQL JOINs are fundamental but their subtleties often trip up even experienced developers.
To make this clearer, I’ve created a visual and code-based cheatsheet you can refer to in seconds, not minutes.
Why This Exists
Most JOIN tutorials either oversimplify or overwhelm. I wanted something between:
Code you can read like a sentence, paired with visuals that explain themselves.
This cheatsheet includes:
- Clear examples for each JOIN type
- Short comments that get to the point
- Visuals that require no explanation
For Developers Who Don’t Like to Guess
If you already know SQL, this isn’t a lesson—it’s a reference.
You won’t find long paragraphs or bloated descriptions here. Just clean queries and concise visuals to validate your logic when it matters.
Use It Your Way
- Keep it open when writing queries
- Share with teammates
- Fork and extend with your own examples
It’s open and ready to grow with you.
Explore the full cheatsheet here:
If it helps you move faster and code with confidence, it’s done its job.
Top comments (0)