I enrolled in this course because the title "Processing Over 500 Billion Financial Data Records" made me think that it would propose methods for handling large-scale data and allow me to practice some of these methods. However, since the content was entirely theoretical, I honestly feel this aspect might remain as a disappointing part. Nevertheless, the course contains good content in terms of broadening the directional approaches for how to handle large-scale data well, and it seems to have provided an opportunity to think once more about whether we truly understand the MySQL we've been using. Thank you for the good lecture.