【SQL】182. Duplicate Emails

Write a SQL query to find all duplicate emails in a table named Person.

+----+---------+
| Id | Email   |
+----+---------+
| 1  | a@b.com |
| 2  | c@d.com |
| 3  | a@b.com |
+----+---------+
1 # Write your MySQL query statement below
2 select Email
3 from Person
4 group by Email
5 having count(*)>1;

 

posted @ 2017-03-03 12:15  wilderness  阅读(107)  评论(0编辑  收藏  举报