SQL
x
USE enwiki_p;
SELECT * FROM revision WHERE rev_page = 12172683 AND rev_parent_id = 0 AND rev_user_text = 'Polbot';
SELECT * FROM revision WHERE rev_page = 12172683 AND rev_parent_id = 0 AND rev_user_text = 'Polbot'
AND EXISTS (SELECT * FROM revision WHERE rev_page = 12172683 AND rev_timestamp < 20180314000000);
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