mysql delete duplicate rows but keep one
DELETE c1 FROM contacts c1 INNER JOIN contacts c2 WHERE c1.id > c2.id AND c1.email = c2.email;
mysql delete duplicate rows but keep one
DELETE c1 FROM contacts c1 INNER JOIN contacts c2 WHERE c1.id > c2.id AND c1.email = c2.email;
mysql delete duplicates
DELETE FROM CONTACTS WHERE ID NOT IN (SELECT * FROM (SELECT max(ID) FROM CONTACTS GROUP BY EMAIL) t); -- ⇓ Test it ⇓ (Fiddle source link)
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