Hmm... I got excited on my own because of the title and thought there would be practical examples, and I wanted to see some real-world work on handling large volumes with MySQL. But there's no such content. In the latter part, it seemed like they were going to cover large-scale data handling, but it ended with explaining one syntax and saying things like "there's actually no need to introduce it to this extent" and "MySQL is sufficient in many cases," which was disappointing. I wanted to know what cases MySQL is sufficient for, when you feel MySQL's limitations in real work, etc. It's disappointing. Since there's a lot of content within the time limit, the depth is somewhat shallow, so it seems like content that beginners or those who want to study MySQL can listen to comfortably and without burden, rather than for working professionals.