Random sample of large article edits from English Wikipedia

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SQL

SELECT revision.rev_id, CAST(revision.rev_len AS INT) - CAST(parent.rev_len AS INT) AS delta FROM (
  SELECT rev_id, rev_len, rev_parent_id, rev_page FROM revision WHERE rev_timestamp BETWEEN '201411' AND '201511' ORDER BY RAND() LIMIT 1000
) AS revision
INNER JOIN page ON page_id = revision.rev_page
LEFT JOIN revision AS parent ON
	revision.rev_parent_id = parent.rev_id
WHERE ABS(CAST(revision.rev_len AS INT) - CAST(parent.rev_len AS INT)) > 100
LIMIT 100;

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