Survived editors on elwiki

SQL

USE elwiki_p;
SELECT CONCAT(month, '-', year) AS monthly, SUM(period < 7) AS less_than_1_week, SUM(period BETWEEN 7 AND 30) AS 1_week_to_1_month, SUM(period BETWEEN 31 AND 365) AS 1_month_to_1year, SUM(period BETWEEN 365 AND 1825) AS more_than_1_year, SUM(period > 1825) AS more_than_5_years 
FROM (
SELECT SUBSTR(first, 5, 2) AS month, SUBSTR(first, 1, 4) AS year, TIMESTAMPDIFF(DAY, first, last) AS period
FROM (
SELECT MIN(rev_timestamp) AS first, MAX(rev_timestamp) AS last
FROM revision_userindex
WHERE rev_user != 0 AND rev_user NOT IN (SELECT ug_user FROM user_groups WHERE ug_group = 'bot')
GROUP BY rev_user
) a
) b
GROUP BY monthly
ORDER BY year, month;
SQL

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