182. Duplicate Emails

时间:2021-08-16 04:38:28

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 |
+----+---------+

For example, your query should return the following for the above table:

+---------+
| Email |
+---------+
| a@b.com |
+---------+

Note: All emails are in lowercase.

在一个名为Person的表中查找所有重复的电子邮件。

MySQL(1156ms):

 # Write your MySQL query statement below
SELECT Email
FROM Person
GROUP BY Email
HAVING COUNT(*) > 1 ;