Assuming categorylinks is required, the following result was found.
List MediaWiki Articleshttps://joellipman.com/articles/cms/mediawiki/list-mediawiki-articles.html
USING latin1) AS PageTitle, CONVERT(t.old_text USING latin1) AS PageContent, (SELECT GROUP_CONCAT(CONVERT(wikimedia_categorylinks.cl_to USING latin1)) FROM wikimedia_categorylinks WHERE wikimedia_categorylinks.cl_from=p.page_id) AS PageCategory FROM...