Since it is a small startup and there is no data analyst, PMs often directly extract data through queries. However, I have not attempted retention and funnel analysis because the queries are complicated. Since the lecture title was about utilizing BigQuery, I took the lecture without hesitation! If you are already proficient in SELECT and JOIN to some extent, it will be easy to follow. If you are new to SQL, I recommend taking the basics class and then the utilization class. The window functions I learned here were so useful that I could use them right away in the field. I will also try retention analysis and funnel analysis soon. Thank you for opening a great lecture :)