Untitled query #84045

SQL

SELECT
    main.page_title AS title_en,
    (SELECT 
	    # count unique(?) articles in main namespace, that linked to this article 
     	COUNT(pl.pl_from)
     	FROM pagelinks AS pl
     	INNER JOIN linktarget AS lt ON
     		lt.lt_id = pl.pl_target_id
     		AND lt.lt_namespace = 0
     		AND pl.pl_from_namespace = 0
     	WHERE lt.lt_title = main.page_title
    ) AS total_inlink,
    (SELECT
     	# count unique(?) article in main namespace, that linked from this article
     	COUNT(pl.pl_target_id)
     	FROM pagelinks AS pl
     	INNER JOIN linktarget AS lt ON
     		lt.lt_id = pl.pl_target_id
     		AND lt.lt_namespace = 0
     		AND pl.pl_from_namespace = 0
     	WHERE pl.pl_from = main.page_id
    ) AS total_outlink
    

FROM page AS talk
# inner join to cut table size
# focus to all possible priority

INNER JOIN categorylinks AS cl_prio ON
    cl_prio.cl_from = talk.page_id
    AND cl_prio.cl_to IN (
        'Top-priority_mathematics_articles',
        'High-priority_mathematics_articles',
        'Mid-priority_mathematics_articles',
        'Low-priority_mathematics_articles',
        'NA-priority_mathematics_articles',
        'Unknown-priority_mathematics_articles')
# focus to all possible quality for an article in main namespace
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;
SQL

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