instruction: Who attracted the most people into the system.
response: WITH FirstQuestions AS (SELECT OwnerUserId, RANK() OVER (PARTITION BY OwnerUserId ORDER BY Id) AS Rank, PostTypeId, AcceptedAnswerId FROM Posts WHERE NOT OwnerUserId IS NULL), AttractedUsers AS (SELECT A.OwnerUserId, COUNT(*) AS Count FROM FirstQuestions, Posts AS A WHERE FirstQuestions.Rank = 1 AND FirstQuestions.AcceptedAnswerId = A.Id AND NOT A.OwnerUserId IS NULL GROUP BY A.OwnerUserId) SELECT DENSE_RANK() OVER (ORDER BY Count DESC) AS Rank, OwnerUserId AS "user_link", OwnerUserId AS "user_id", Count FROM AttractedUsers ORDER BY Count DESC, OwnerUserId LIMIT 4000