LeetCode Solution, Easy, 182. Duplicate Emails
182. Duplicate Emails
題目敘述
SQL Schema >
Create table If Not Exists Person (id int, email varchar(255)) Truncate table Person insert into Person (id, email) values ('1', 'a@b.com') insert into Person (id, email) values ('2', 'c@d.com') insert into Person (id, email) values ('3', 'a@b.com')
Table: Person
+-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | email | varchar | +-------------+---------+ id is the primary key column for this table. Each row of this table contains an email. The emails will not contain uppercase letters.
Write an SQL query to report all the duplicate emails.
Return the result table in any order.
The query result format is in the following example.
Example 1:
Input: Person table: +----+---------+ | id | email | +----+---------+ | 1 | a@b.com | | 2 | c@d.com | | 3 | a@b.com | +----+---------+ Output: +---------+ | Email | +---------+ | a@b.com | +---------+ Explanation: a@b.com is repeated two times.
題目翻譯
解法解析
解法範例
MySQL