That's really interesting. The two folks from Facebook contradict each other when talking about joins. Aditya says "No joins in production.", while Mark says

That's really interesting. The two folks from Facebook contradict each other when talking about joins. Aditya says "No joins in production.", while Mark says "Some of the stories I read about sharded SQL state that you don't do joins when you have sharded MySQL, and that has never been the case for the workloads that I watch. You're always doing some complex query processing within a shard." Anyway, I can see how you might have come away with the notion that MySQL is a glorified key value store by watching the first video which only briefly touches on their MySQL usage.