Very cool. I like the SQL questions.<p>I have a question I'm going to throw out there for HN. How many of you bounce back and forth between SQL and Python, even though you could stick within SQL alone? For example, one question (Airbnb) was about year-over-year growth by looking at the count of hosts registered for each year. I might be inclined to go as far as getting the count through SQL, but then (maybe in a notebook) just write the rest in python.<p>I'm not asking how many people use SQL and Python together (my guess is almost everyone does), I mean how often do you use SQL just for the select, join, filtering and aggregation, but then go to python even though you know there's a way to do this without leaving SQL?