SELECT

    main.page_title AS title_en,

    (SELECT 

        # count unique(?) articles in main namespace, that linked to this article 

        COUNT(t_pl.pl_from)

        FROM pagelinks AS t_pl

        INNER JOIN linktarget AS t_lt ON

            t_lt.lt_id = t_pl.pl_target_id

            AND t_lt.lt_namespace = 0

            AND t_pl.pl_from_namespace = 0

        WHERE t_lt.lt_title = main.page_title

    ) AS total_inlink

​

FROM page AS talk

​

# focus to all possible quality for an article in main namespace

# this should also implicitly include article's priority

INNER JOIN categorylinks AS cl_qual ON

    cl_qual.cl_from = talk.page_id

    AND cl_qual.cl_to IN (

        'FA-Class_mathematics_articles',

        'FL-Class_mathematics_articles',

        'FM-Class_mathematics_articles',

        'GA-Class_mathematics_articles',

        'B-Class_mathematics_articles',

        'C-Class_mathematics_articles',

        'Start-Class_mathematics_articles',

        'Stub-Class_mathematics_articles',

        'List-Class_mathematics_articles',

        'Disambig-Class_mathematics_articles',

        'Redirect-Class_mathematics_articles',

        'Unassessed_mathematics_articles')

​

# join to get the main article's ID

INNER JOIN page AS main ON

    main.page_namespace = 0

    AND main.page_title = talk.page_title

​

GROUP BY

    main.page_title

LIMIT 10;