This Leetcode problem Duplicate Emails LeetCode Solution is done in SQL.
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Duplicate Emails LeetCode Solution
Table of Contents
Problem Statement
Column Name | Type |
id | int |
varchar |
Person
id is the primary key (column with unique values) for this table. Each row of this table contains an email. The emails will not contain uppercase letters.
Write a solution to report all the duplicate emails. Note that it’s guaranteed that the email field is not NULL.
Return the result table in any order.
The result format is in the following example.
Example 1:
Input:
id | |
1 | a@b.com |
2 | c@d.com |
3 | a@b.com |
Output:
a@b.com |
Explanation: a@b.com is repeated two times.
Duplicate Emails LeetCode Solution MySQL
select
Email
from
Person
group by
Email
having
count(Email) > 1;
Code language: SQL (Structured Query Language) (sql)