182. Duplicate Emails
Question 182
https://leetcode.com/problems/maximum-depth-of-binary-tree/description/
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.
Answer
By MySQL
# Write your MySQL query statement below
SELECT Email
FROM Person
group by Email
having count(*) > 1Last updated