Her question that starts the post is about doing it in a single query (no subqueries.) I kinda had this misunderstanding on Twitter too when responding to an ea

Her question that starts the post is about doing it in a single query (no subqueries.) I kinda had this misunderstanding on Twitter too when responding to an earlier diagram of hers https://twitter.com/firasd/status/1172874054002307073 https://twitter.com/firasd/status/1172874054002307073