EpochFail's untitled query #1407080984

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

SQL

SELECT 
	LEFT(curr.rev_timestamp, 4) AS year,
	prev.rev_len IS NULL OR prev.rev_len < curr.rev_len AS content_added,
	COUNT(*)
FROM revision curr
LEFT JOIN revision prev ON curr.rev_parent_id = prev.rev_id
GROUP BY 1,2;

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