DELETE FROM wynews WHERE title IN (SELECT * FROM (SELECT title FROM wynews GROUP BY title HAVING COUNT(title) > 1) t1) AND Id NOT IN (SELECT * FROM (SELECT MIN(Id) FROM wynews GROUP BY title HAVING COUNT(title) > 1) t2)
DELETE FROM wynews WHERE title IN (SELECT * FROM (SELECT title FROM wynews GROUP BY title HAVING COUNT(title) > 1) t1) AND Id NOT IN (SELECT * FROM (SELECT MIN(Id) FROM wynews GROUP BY title HAVING COUNT(title) > 1) t2)