Hello. While most lectures are based on MySQL, I decided to take this course to learn more deeply about PostgreSQL in terms of scalability and features. However, as approximately 3 years have passed since the course was produced, it seems that PostgreSQL has undergone several functional updates. For example, recent versions have added features with high practical utility, such as date handling like last_day(). I also believe various improvements have been made in areas I am not familiar with. Therefore, if you have plans to revise the course in the future, I wanted to offer this feedback that it would be very helpful if you could update it to reflect these latest features. Thank you for creating a great course, and I look forward to beneficial content in the future.