LeetCode içerisinde bulunan “Duplicate Emails”‘ sorusunun açıklaması ve çözümü.
🔥 LeetCode 182. Duplicate Emails: https://leetcode.com/problems/duplicate-emails/
➡️ Problem açıklaması:
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.