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Q&A for experienced flyers, pilots, and builders of drones and model aircraft

SELECT 
    FORMAT(p.CreationDate, 'yy-MM') as [Month],
    SUM(CASE WHEN t.TagName = 'go' THEN 1 ELSE 0 END) as GoQuestions,
    SUM(CASE WHEN t.TagName = 'sql' THEN 1 ELSE 0 END) as SQLQuestions,
    SUM(CASE WHEN t.TagName = 'kotlin' THEN 1 ELSE 0 END) as KotlinQuestions,
    SUM(CASE WHEN t.TagName = 'scala' THEN 1 ELSE 0 END) as ScalaQuestions
FROM Posts p
INNER JOIN PostTags pt ON pt.PostId = p.Id
INNER JOIN Tags t ON t.Id = pt.TagId
WHERE 
    p.PostTypeId = 1  -- 1=Question
    AND t.TagName IN ('go', 'sql', 'kotlin', 'scala')
GROUP BY 
    FORMAT(p.CreationDate, 'yy-MM')
ORDER BY 
    [Month];

fork query

edited feb 28

created feb 28 anonymous