Lc182- 查找重复的电子邮箱

编写一个 SQL 查询,查找 Person 表中所有重复的电子邮箱。

示例:

+----+---------+
| Id | Email   |
+----+---------+
| 1  | a@b.com |
| 2  | c@d.com |
| 3  | a@b.com |
+----+---------+
根据以上输入,你的查询应返回以下结果:

+---------+
| Email   |
+---------+
| a@b.com |
+---------+

来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/duplicate-emails
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# Write your MySQL query statement below
select email from person
 group by email
having count(email)>1
posted @ 2020-01-08 13:18  小傻孩丶儿  阅读(152)  评论(0编辑  收藏  举报