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

SELECT 
    YEAR(CreationDate) AS QuestionYear,
    COUNT(CASE WHEN Tags LIKE '%<r>%' THEN 1 END) AS R_Questions,
    COUNT(*) AS TotalQuestions,
    SUM(COUNT(*)) OVER (ORDER BY YEAR(CreationDate)) AS Year_Total,
    ROUND(
        (COUNT(CASE WHEN Tags LIKE '%<r>%' THEN 1 END) * 100.0) / COUNT(*), 
        2
    ) AS R_Percentage
FROM 
    Posts
WHERE 
    PostTypeId = 1 -- 1 = Questions
GROUP BY 
    YEAR(CreationDate)
ORDER BY 
    QuestionYear;

fork query

edited dec 6

created dec 6 aungthurahtoo