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[LeetCode][SQL]Duplicate Emails

时间:2015-05-16 17:54:32      阅读:118      评论:0      收藏:0      [点我收藏+]

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https://leetcode.com/problems/duplicate-emails/

Duplicate Emails

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 |
+---------+



select Email from Person group by Email having count(*) > 1

 

[LeetCode][SQL]Duplicate Emails

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原文地址:http://www.cnblogs.com/Liok3187/p/4508053.html

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