Hello Mr. Hwang Yong-hak, thank you so much for taking the time to leave a review. Actually, I had many concerns while preparing this course. I thought about what parts I should teach you, what concepts would be more effective in practice, and selected these topics after much consideration!! I think that the process of writing general queries doesn't really provide much help. Using UNION well, applying WHERE conditions really well - I thought these topics don't fit well with current trends. Because now AI uses them better than me and other senior developers, analyzes better, and teaches better. So while I do cover general queries, rather than focusing on that part, I thought it would be right to show you what you can utilize and apply while using this MySQL database. Based on this content, I thought I could help improve your work performance by asking questions to AI later. So because this course contains a lot of this perspective, unfortunately it seems like it wasn't the course you wanted, Mr. Hwang Yong-hak. Still, I will work hard to provide better courses in the future and show you a better version of myself. Thank you so much for taking the course!!!