instruction: Histogram of time to first answer.
response: SELECT hours_to_first_answer, COUNT(*) AS answer_count FROM (SELECT qId, MIN(hours_to_answer) AS hours_to_first_answer FROM (SELECT questions.Id AS qId, questions.CreationDate AS qCreationDate, answers.Id AS aId, answers.CreationDate AS aCreationDate, CAST((JULIANDAY(CreationDate) - JULIANDAY(questions.CreationDate)) * 24.0 AS INT) AS hours_to_answer FROM (SELECT * FROM Posts WHERE PostTypeId = 1 AND Id IN (SELECT PostId FROM PostTags)) AS questions INNER JOIN (SELECT * FROM Posts WHERE PostTypeId = 2 AND ParentId IN (SELECT PostId FROM PostTags)) AS answers ON questions.Id = answers.ParentId) AS qa GROUP BY qId) AS latency GROUP BY hours_to_first_answer ORDER BY hours_to_first_answer