wangbin579

This course comes in two versions: a Premium Edition and a Course-Only Edition. I mainly support the Premium Edition, where I help learners by answering questions and guiding them to a deeper understanding. Premium Edition (with private Discord access): [Explore MySQL on…

I had a hardware problem recently, and it was much harder to fix than any software issue I’ve had before. Even removing the latest patches didn’t help. So I asked a computer repair guy — he fixed it in just 10 minutes. The problem? The laptop keyboard was broken and messing up…

Windows scared me today! It updated by itself, then my keyboard stopped working and I couldn’t click anything. Restarting didn’t help either. Luckily, face recognition still worked and gave me about five minutes to undo the update before everything locked up.

This is something I discovered while working on Lesson 26: Why JOINs Often Outperform Correlated Subqueries — it turns out that official MySQL itself was holding things back.

Sometimes, you’ll only see real speed improvements after changing how MySQL works inside.

In the past, even the best experts only knew one part of the whole picture. Most tech articles focused too much on code — which is great for developers but not very helpful for DBAs or general users. AI alone doesn’t fully understand how databases work deep inside. But when…

I’m almost done with Lesson 18, and the hardest part is pretty much done. I’ve been so busy that I haven’t had time to read good papers.

Our beginner, intermediate, and advanced courses are already full, and we barely have space to include more classic case studies. One of the newest cases we collected shows how a large undo log can put too much pressure on the buffer pool and cause big performance drops.

The Premium Edition teaches you how to fish — a method that works for most databases. If you follow it step by step, becoming a database expert is totally possible. It really makes things easier and more practical — even I learned a lot about MySQL while building this course. The…

Before, when I had zero balance in PayPal, I couldn’t sell on better platforms. Thanks to everyone — now I have more options to choose from in the future.

If no one gets the $99 course, I’ll raise the price to $199. Big thanks to all of you — you were the very first to support me. By the way, the course is now updated through Lesson 10.

When I was a kid, my family didn’t have much money, but we always prioritized education. I learned that no matter how poor you are, you should never stop learning. Sometimes, a single good book can change your life. The more you try, the more opportunities you’ll discover. Even…

Besides answering course questions, I also share content on Discord that doesn’t quite fit on Twitter — like over 100 advanced MySQL topics. If you’re interested, I can guide you to explore MySQL on your own. And if you ever run into tricky issues, I’m here to help trace them…

When you buy a course, you should think about how it helps you grow, not just the small cost. This course might not even exist without AI. AI doesn’t work perfectly on its own, but it gives experts superpowers. Together, AI’s wide knowledge and experts’ deep skills can create a…

The auto Discord invite didn’t work for premium course buyers, but don’t worry — I’ll send the invite link by email. Those who bought the premium course will get access.

If there's a discount and they don’t use my link, the platform takes even more. The fee is still based on the full price, not the discounted one.

Almost 20% has already been taken, even before sending it to my Chinese account and paying taxes. In the end, I’ll probably only get around 50%.

If you want to grow faster, learning with an expert really helps — especially for young people. Don’t worry too much about the $299. In the US, that’s not even a lot (maybe just a few cartons of eggs). Think bigger, and you’ll get much more in return. If Gumroad didn’t give you…

In China, this price is only about 1/5 of a day’s salary.