MySQL Performance Optimization Guide for Non-Specialists: Beginner to Advanced (SQL Tuning Edition)

🤬 Damn it, I can't do this anymore!

I'm Park Jaesung, who started development as a non-major and worked as CTO at various companies, and am currently active as an educator. I also started development as a non-major and had a time when I was studying MySQL performance optimization.

While studying MySQL performance optimization, there were quite a few points that I found difficult. First, there were too many difficult and unfamiliar terms. B+Tree, covering index, full table scan, random access, and many other unfamiliar terms made me feel resistant to learning.

I overcame this reluctance and managed to read through books related to performance improvement, but there were not many examples of how to optimize MySQL performance in different situations. As a result, I didn't know how to actually improve performance in real projects.

Since I also went through such difficulties, I thought I should create a MySQL performance optimization course that even non-majors can immediately apply in real-world situations.

✨ 4 Points I Focused on While Creating the Course

👍 Great for these types of people!

🙊 After completing this course?

🍡 Tasting

✔ Reference Notes

The course proceeds under the assumption that you have basic knowledge of SQL statements. Therefore, we recommend taking this course after you have learned basic SQL statements. If you encounter any parts that are difficult to understand while studying, please feel free to ask questions immediately using the Q&A board or 1:1 open chat room😊

🚨 Make sure to check what kind of person is providing the education!

If you meet the wrong doctor, you might face death because your illness cannot be cured at that moment. However, death ends with the pain of that moment. But if you meet the wrong teacher and receive poor education, you will suffer throughout your entire life.

Poor education can lead you to unwanted companies, smaller salaries than expected, and a lifetime of suffering. Not only that, but the wrong education you received can be passed down to your children as well.

Education can truly change a person's life in a positive way, but on the other hand, I think it can also completely ruin a person's life. That's why I believe education carries such heavy responsibility.

Therefore, please check who is providing the education, what kind of person they are, and what path they have walked, and make a careful judgment.

👋 Hello!
I'm finally introducing myself now ( ⸝⸝•ᴗ•⸝⸝ )੭⁾⁾

Hello!

I started studying development as a non-major. I've already become a 6-year developer! Recently, I worked as a developer while serving as CTO at two companies. Whenever I had time, I've been doing coding lectures, company development consulting, and presentations.

The number of students I've taught has now exceeded 24,000 (as of July 2025)! Every time I teach various students, I always feel the same way - I can't forget the sense of fulfillment from education, so I plan to continue providing education consistently on Inflearn.
(* Students who passed interviews at Kakao Pay, Yanolja, and Woowa Brothers among my learners)

Just as I received a lot of help during difficult and challenging times, I wanted to become someone who could help many other people as well. And I felt most proud and happy when the value I created through development had a positive impact on others.

For these reasons, I hope that by sharing and giving what I have worked hard to achieve, those people can live a slightly better life.

Thank you!

🏆 Course Best Review

** This is a review written for the previously created .

🚌 Feeling overwhelmed about what order to take the courses?

'[2025] Essential Curriculum for Getting a Job as a Backend Developer (IT Service Companies)' Please refer to this!

🐶 Get Course Discounts with Roadmaps

➡ Performance optimization for large-scale traffic handling (https://inf.run/ecBS1)