LeetCode182-MySQL-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 | [email protected] | | 2 | [email protected] | | 3 | [email protected] | +----+---------+
根据以上输入，你的查询应返回以下结果：
+---------+ | Email | +---------+ | [email protected] | +---------+
说明：所有电子邮箱都是小写字母。
没什么好说的。
So show you my code:
# Write your MySQL query statement below
SELECT t1.Email AS Email
FROM Person AS t1, Person AS t2
WHERE t1.Email = t2.Email AND t1.Id != t2.Id
GROUP BY t1.Email