MySQL/196. Delete Duplicate Emails 删除重复的电子邮箱

题目       代码部分一（1433ms 50.12%） # Write your MySQL query statement below DELETE a FROM Person a,Person b WHERE a.Email=b.Email AND a.Id>b.Id;     代码部分二（933ms 90.55%） # Write your MySQL query

>>阅读原文<<