Even though the lecture time is short, I really appreciate how you clearly explain only the important parts. I thought it would be mostly theoretical lectures and wouldn't cover SQL query statements, but it was great that you showed examples one by one while teaching basic syntax and how to write query statements. After that, the coverage of joins, normalization, transactions, indexes and data optimization, and security was excellent. I haven't tried other paid lectures yet, but the appendix of the final lecture was titled "Interview Practice" and showed actual questions and answers, which was good for self-study and practice. The lecture time doesn't take too long if you focus and listen, so I think I'll go through it several times again. Thank you.