[LeetCode] Duplicate Emails

Posted 2020-10-03 immjc

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

+----+---------+
| Id | Email   |
+----+---------+
| 1  | [email protected] |
| 2  | [email protected] |
| 3  | [email protected] |
+----+---------+

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

+---------+
| Email   |
+---------+
| [email protected] |
+---------+

Note: All emails are in lowercase.

# Write your mysql query statement below
SELECT Email FROM Person GROUP BY Email HAVING COUNT(Email) > 1;
# 1225