Users by number of merges and merged data amount

This query is marked as a draft This query has been published by Matěj Suchánek.

SQL

USE wikidatawiki_p;
#DESCRIBE revision;
SELECT rev1.rev_user_text, COUNT(rev1.rev_id), SUM(rev1.rev_len - rev2.rev_len)
	FROM revision AS rev1
	JOIN revision AS rev2 ON rev2.rev_id = rev1.rev_parent_id AND rev1.rev_len IS NOT NULL AND rev2.rev_len IS NOT NULL
WHERE rev1.rev_comment LIKE '%wbmergeitems-from%'
GROUP BY rev1.rev_user_text HAVING COUNT(rev1.rev_id) > 50;

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