I really enjoyed taking this SQL tuning course. After just writing simple queries at work, studying tuning like this makes me feel like my horizons have broadened. Your explanations are very clear and easy to understand, and I also appreciate that you provide the course materials separately via GitBook!! However, I wish there were more practice problems ㅠㅠ I would be grateful if you could create a course focused on problem-solving or on pandas next time! Thank you so much for the great course.

I'm learning a lot from the great lectures + prepared practice examples + exercises. Thank you!

Oracle seems really great for accurately understanding and organizing the grammar I know. The examples are familiar too, so they stick in my head easily. Using the note feature while studying helps me practice well.

It was great for learning the practical basics

I'm a non-major who passed the practical exam with a 90 and wanted to leave a review!! I knew statistics well but had absolutely no knowledge of coding, so I was at a loss. I watched the YouTube pandas lectures about 3 times and the Inflearn past exam lectures about 3 times too! I recommend copying and pasting the past exam code in the test environment and following along. Thank you for creating virtual data and sharing the code.. Both Inflearn and YouTube were incredibly helpful. Thank you for teaching so easily and well. I don't think I would have passed without this course... Your voice is also calm, so it really sticks in my ears. Oh, for this exam's Type 2 problem, I submitted without doing train test split and got an f1 score of 1.0, but 5 points were deducted😭😭 But when I did split, I got 0.5, so I couldn't submit that😭 It was probably data with a large imbalance.. I'll study hard based on the coding knowledge I learned! I recommend this course

This is an excellent course for intensive learning. I learned econometric analysis with Stata, so I started without knowing even the basics of Python. The biggest advantage is that the instructor answers questions in real-time. I barely passed after going through the course three times, and I think it would be an even better course if each problem were solved in 2-3 different ways!

Thank you for the valuable lecture.

The content is substantial...^^

It was so incredibly helpful. While working, finding past questions or mock exams was a struggle, and I was at a loss as to what to do, but they provided all the code and explained everything kindly, thanks to which I passed! ! It's the best!! Highly recommended!!

No help from other courses, I passed 1st try with 90, only with this course.🖐 Excellent course for learning from basics to application. Thank you!!!