Articles that had to wait more than 30 days for a review

gistfile1.sql

SELECT `wiki_revision`.`summary`, DATEDIFF(`wiki_revision`.`reviewed`,`wiki_revision`.`created`)
FROM `wiki_revision`
JOIN `wiki_document` ON `wiki_document`.`id`=`wiki_revision`.`document_id`
WHERE `wiki_document`.`locale` LIKE 'en-US'
AND `wiki_revision`.`created` >= '2013-01-01'
AND DATEDIFF(`wiki_revision`.`reviewed`,`wiki_revision`.`created`) >=30;