Learn MySQL from a Toss developer who processes over 500 billion financial data records [ By. Non-CS major & Toss developer ]

I really enjoyed the lecture. While listening to it, I thought about parts that other people might find helpful as reference, so let me organize the areas where I found it beneficial. Advantages: 1. It's really realistic. When covering topics, the instructor directly mentions if certain forms aren't commonly used in practice, often saying "I'm covering this because it's good to know, even though it's not frequently used." I think this shows that a truly skilled developer is making an effort to share both realistic and less practical aspects. 2. The content itself is really valuable. From general and simple CRUD operations to explanations of various architectural perspectives possible with MySQL - it's not just content limited to databases, but contains rich material about development itself. 3. These seem like topics you can't hear anywhere else. Most MySQL or database lectures are limited to how to write queries and what functions are available, but this lecture uses procedures and explains well the essential topics of how databases should be used. However, honestly, I think this lecture has some disadvantages as much as it has advantages. 1. The difficulty level doesn't seem easy. Beginners in development might find it difficult to follow due to lack of basic knowledge. 2. The explanations aren't that rich and Kind. While covering really diverse topics, the explanations aren't proportionally detailed. To put it simply, it feels somewhat like having a mentor who's really good at development, but from the mentor's perspective, some things are so obvious that they just skip over them. Conclusion: But even excluding all these points, I think it's a really good lecture. If you actually have the will to study and want to learn many aspects, this lecture would be suitable. Conversely, if you're fine with learning just the basics and want to be spoon-fed, this lecture probably won't be of much help. From my perspective, it was a really satisfying lecture because I could learn not only about MySQL but also think about its applications and study from an architectural perspective. I was so impressed that I'm leaving a comment like this for the first time.

I'm a server developer working at Toss who participated most deeply in this MySQL course. Hong previously prepared and created a Kafka-related course together with Choi, and since that topic was really good and I also wanted to share my knowledge in a deeper way, I decided to participate like this. - Of course, I had participated indirectly or directly before, but I was more immersed and engaged in this course. Actually, I don't think simply covering MySQL content alone would have that great of a learning effect for you all. Currently, with AI advancement, AI actually writes queries better than we do. What you need to know here is "what aspects you can consider" and "what methods are available." I think the ability lies in knowing these aspects and knowing how to instruct AI accordingly. I hope this course will be very helpful to you all from that perspective. Please show lots of interest. Thank you!!

I think this is a great topic for gaining truly deep knowledge about MySQL. It covers some basic CRUD operations and focuses only on queries that are realistically used, which makes it even more helpful. However, the more important part seems to be the design patterns at the end. It was a great help in gaining the perspective to see the forest. Thank you.

I am a junior server developer who is currently working at a small startup after preparing for employment by referencing many of your lectures. I think the topics you cover are really excellent lectures, and from my personal experience, I believe there are many lectures with an abundance of high-quality content. I took this lecture without any doubt, and as my personal number one instructor, this lecture also had really great content. I think I'm in the process of writing only basic CRUD at the company, but through this lecture, I came to think that I should consider more diversity and architecture rather than just CRUD. When I conducted a POC on this topic at the company, everyone praised it as a really good topic... Even though it wasn't something I did myself but just followed along watching you, I felt so good that I immediately bragged about you 😆😆😆😆 I would be so grateful if you could create more beneficial lectures in the future. You've saved a person's life!!!

First, I learned from your Kafka course and it was so incredibly helpful and I was moved to the point of admiring you as an instructor... so I ended up taking this course as well. I think this course is somewhat more focused on MySQL compared to Kafka and the previous course. But just like when I watched the real Kafka course, it was tremendously helpful. It was a great time to review architecture once again, and it was such a beneficial time having you explain with actual patterns as examples. And these days, as I use AI as a tool rather than a competitor, I do all my coding and query work through AI, but seeing you teach not just simple query tuning but also internal methods and tuning techniques made me realize 'Ah, this person is aware that AI handles simple tasks and created this course accordingly.' It seems like a course that includes only content that would be helpful with more realistic topics after considering so many aspects... This is the first time in my life I've written such a long review, which shows just how helpful it was. Thank you so much and I'll look forward to your next course if it gets released!!! :)

It's too abstract and broad. I'd appreciate it if you could focus specifically on databases, but you're discussing too many different things.

I enjoyed watching this great topic. Thank you :)