Answer volume for top Firebasers by month

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Chess

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CREATE TABLE #users (UserId nvarchar (35), Name nvarchar (100));

INSERT INTO #users(UserId, Name) VALUES 
(209103, 'puf'),
(394010, 'katowulf'),
(110915, 'mikelehen'),
(879295, 'rdimarco'),
(1373162, 'deast'),
(5385206, 'sganem'),
(3875023, 'mpmcdonald'),
(5081766, 'bojeil'),
(807126, 'dougstevenson'),
(1410370, 'arthurthompson'),
(839465, 'mimming'),
(324977, 'samstern'),
(819314, 'ianbarber'),
(1172232, 'gregsoltis'),
(937583, 'raynor'),
(613115, 'dgiorgino'),
(1915327, 'dmabin'),
(4186942, 'bjiang'),
(4625829, 'aalawi'),
(4447017, 'andysoto'),
(978525, 'eobrain'),
(9849, 'rsattar'),
(2955366, 'jwenger'),
(1028647, 'jamesdaniels'),
(226391, 'bleigh'),
(7688078, 'rjh'),
(153407, 'danmcg'),
(3975963, 'mbonnell'),
(42960644, 'krausefx'),
(5190886, 'hkj'),
(2546685, 'oleksiyi'),
(556617, 'paulbeusterien'),
(6253640, 'mcg'),
(4816918, 'jhuleatt'),
(7164592, 'personjennifer'),
(6122677, 'kianam'),
(2207583, 'tburner'),
(1973552, 'ulukaya'),
(10880930, 'sumit'),
(11209105, 'Jeff Avis'),
(11229774, 'marcjordan'), 
(5827947, 'isachen'), 
(9789871, 'psanketi'),
(3945408, 'juanlara'),
(3043663, 'martinpatrick'),
(9754679, 'rich-gowman'),
(7644371, 'jim-morrison'),
(4092401, 'ying-li'),
(6122677, ' kianam'),
(11850212, 'ryanpbrewster')

;

CREATE TABLE #answers (MONTH date, Name nvarchar(100), Count int);

INSERT INTO #answers

SELECT 
  DATEADD(MONTH, DATEDIFF(MONTH, 0, CreationDate), 0) AS [MONTH]
  , Name
  , COUNT(*) AS Count
FROM Posts
INNER JOIN #users ON Posts.OwnerUserId = #users.UserId
WHERE CreationDate > '2017-01-01'
GROUP BY DATEADD(MONTH, DATEDIFF(MONTH, 0, CreationDate), 0), Name
ORDER BY [MONTH] DESC


SELECT * FROM #answers
WHERE Name IN (
  SELECT TOP 10 Name FROM #answers WHERE MONTH IN (
    SELECT TOP 10 MONTH FROM #answers ORDER BY MONTH DESC
  ) ORDER BY Count DESC
)
ORDER BY MONTH DESC

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