SQL on idwiki side #1

SQL

SELECT
	main.page_title AS title_en,
    ll.ll_title AS title_id,
    cl_prio.cl_to AS priority,
    cl_qual.cl_to AS quality,
	main.page_is_redirect AS is_redirect,
    main.page_len AS article_length,
    talk.page_len AS talk_length,  #! excluding subpage(s)
    # main.page_touched AS last_touched	 #! not informative... i think
    (SELECT
     	# count unique(?) language of this article
     	COUNT(t_ll.ll_lang)
     	FROM langlinks AS t_ll
     	WHERE t_ll.ll_from = main.page_id
   	) AS total_lang,
    (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,
    (SELECT
     	# count unique(?) article in main namespace, that linked from this article
     	COUNT(t_pl.pl_target_id)
     	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_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

# join because i need this data to help idwiki. left join is
# intentional, to get empty result if page isn't created yet 
LEFT JOIN langlinks AS ll ON
	ll.ll_from = main.page_id
    AND ll.ll_lang = 'id'
SQL

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