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Thank you. I really enjoyed hearing about your great experiences and insights.

I took this course because I needed Spark for work. Not only is the content great, but the instructor's teaching skills are also excellent 😊😊 I will take all of your other courses as well. Thank you for uploading such a great course. Please upload more!

The best of both worlds from extensive practical experience + university lectures... It's so great that you don't just make us memorize syntax and learn mechanically, but explain the principles of why we use this grammar...!

This was a lecture where I learned so much. I was always vaguely curious about what kind of data analysis work DBAs do, and this was an opportunity to broaden my thinking about their role. I also learned more about SQL that I had been using without really understanding. Especially, analyzing channels through sessions was really fascinating. So that's how they collect data..!! Since I'm still at a junior level, everything felt so new and interesting. I'll study harder. Thank you, Giyong!!

I enjoyed listening to this and found it really interesting. I listened to get a sense of what kind of personality you have before taking other courses, and it was successful. I hope you'll continue to be active for a long time and have fun with it.

Although it's a short lecture, it makes me think about many things.

It's so great that I can learn from the very basics! I'm thinking of taking all of the instructor's courses one by one.

I gained a lot of learning. Thank you very much.

Things were unclear when a dedicated data team was formed at the company, but now I know the direction to take.