Learning Patterns created per month

SQL

#count Learning Patterns created per month
SELECT EXTRACT(YEAR FROM DATE_FORMAT(rev_timestamp,'%Y%m%d%H%i%s')) AS `year`, 
EXTRACT(MONTH FROM DATE_FORMAT(rev_timestamp,'%Y%m%d%H%i%s')) AS `month`, 
COUNT(rev_id) AS patterns_created 
FROM metawiki_p.revision r
INNER JOIN metawiki_p.page AS p
ON r.rev_page = p.page_id 
INNER JOIN metawiki_p.categorylinks AS cl 
ON p.page_id = cl.cl_from
WHERE p.page_namespace = 200
AND cl.cl_to IN ("Learning_patterns") 
AND r.rev_parent_id = 0
GROUP BY `year`, `month` 
ORDER BY `year` ASC, `month` ASC;

SQL

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