تحليل رقمي لسير تطور المقالات المختارة في ويكيبيديا العربية

SQL

use wiki_p;
select ori.*, r1.rev_timestamp latest_revision, r1.rev_len latest_size,
DATEDIFF(str_to_date(r1.rev_timestamp, '%Y%m%d'), str_to_date(created_when, '%Y%m%d')) growth_period,
ROUND(100 * (r1.rev_len / original_size - 1)) growth_percentage,
30 * ROUND(100 * (r1.rev_len / original_size - 1)) / DATEDIFF(str_to_date(r1.rev_timestamp, '%Y%m%d'), str_to_date(created_when, '%Y%m%d')) growth_rate 
from
(
  select page_title, page_namespace, rev_page, rev_timestamp as created_when, rev_len original_size
  from revision
  join page
  on rev_page = page_id
  where rev_parent_id = 0
  #and rev_comment like '%ابزار/به_ویکی‌فا%'
  AND rev_timestamp BETWEEN 20150101000000 AND 20161230000000
  and page_random > RAND()
  limit 1000
) ori
join revision r1
on ori.rev_page = r1.rev_page
left join revision r2
on r1.rev_page = r2.rev_page
and r2.rev_timestamp > r1.rev_timestamp
where r2.rev_timestamp is null

SQL

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