nlwiki Category sort key starting with weird characters

SQL

SELECT page_namespace AS ns, page_title, cl_to, cl_sortkey_prefix
FROM categorylinks, page
WHERE
	cl_to NOT REGEXP '^Wikipedia:' AND cl_from=page_id AND
	cl_sortkey_prefix REGEXP '^[\\|\\[\\],\\.\\(\\)\\{\\}:;\'"%^\\?~\\+-]'
ORDER BY cl_sortkey_prefix, page_namespace, page_title;
SELECT page_namespace AS ns, page_title, cl_to, cl_sortkey_prefix
FROM categorylinks, page
WHERE
	cl_to NOT REGEXP '^Wikipedia:' AND cl_from=page_id AND
	cl_sortkey_prefix=REPLACE(cl_to,'_',' ')
ORDER BY cl_sortkey_prefix, page_namespace, page_title

SQL

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