SQL for Non-Programmers -- Homework Practice

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Statistical Analysis

Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization

SELECT TOP 10 
  SUM(CASE WHEN a.Score > 0 THEN 1 ELSE 0 END) Accepted, 
  COUNT(*) Total,
  SUM(CASE WHEN a.Score > 0 THEN 1 ELSE 0 END) * 100.0 / COUNT(*) Perc
FROM Posts p
LEFT JOIN Posts a ON p.AcceptedAnswerId = a.Id
WHERE p.ClosedDate > DATEADD(week, -1, GETUTCDATE())

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