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.