182. Duplicate Emails

标签：lower   cat   email   note   .com   return   com   sel   select   

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.

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

182. Duplicate Emails

标签：lower   cat   email   note   .com   return   com   sel   select   

原文地址：https://www.cnblogs.com/bernieloveslife/p/9833880.html