Number of properties created each month on Wikidata

This query is marked as a draft This query has been published by Envlh.

SQL

SELECT `date_creation`, COUNT(*) AS `count` FROM (
    SELECT MIN(SUBSTRING(`rev_timestamp`, 1, 6)) AS `date_creation`
    FROM `page`, `revision`
    WHERE `page`.`page_id` = `revision`.`rev_page`
    AND `page`.`page_namespace` = 120
    GROUP BY `page`.`page_title`
) `a`
GROUP BY `date_creation`
ORDER BY `date_creation`

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