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Q&A for those who study, teach, research and apply economics and econometrics
-- How Rich Are the 1% (Active Users)
-- Occupy Stack Overflow!
;WITH percentile AS (
SELECT NTILE(100) OVER (ORDER BY Reputation DESC) as p, Reputation, DisplayName
WHERE Reputation >= 200
total AS (
SELECT SUM(Reputation) as total FROM percentile
SELECT 'The ' + CASE p WHEN 1 THEN '1' ELSE '99' END + '%' AS Who, SUM(Reputation) AS Rep, CAST(SUM(Reputation) AS DECIMAL(19,2)) / total.total * 100 AS PctShareOfWealth
FROM percentile, total
GROUP BY CASE p WHEN 1 THEN '1' ELSE '99' END, total.total