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-- Delete all Duplicate Rows except for One in MySQL

DELETE n1 FROM names n1, names n2 WHERE n1.id > n2.id AND n1.name = n2.name;
-- OR --
DELETE n1 FROM names n1, names n2 WHERE n1.id < n2.id AND n1.name = n2.name;

-- http://stackoverflow.com/questions/4685173/delete-all-duplicate-rows-except-for-one-in-mysql