196. Delete Duplicate Emails#1
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Solution#1
# Write your MySQL query statement belowDELETE p1FROM Person p1, Person p2 WHERE p1.Email = p2.EmailAND p1.Id > p2.IdSolution#2(更快)
# Write your MySQL query statement belowDELETE FROM Person WHERE Id NOT IN ( SELECT T.Id FROM ( SELECT MIN(Id) AS Id FROM Person GROUP BY Email ) T) 0 0
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