182. Duplicate Emails--solution

阿新 • • 發佈：2018-03-03

query name table div tab find AI ould ble

Write a SQL query to find all duplicate emails in a table named Person.

+----+---------+
| Id | Email   |
+----+---------+
| 1  | [email protected] |
| 2  | [email protected] |
| 3  | [email protected] |
+----+---------+

For example, your query should return the following for the above table:

+---------+
| Email   |
+---------+
| [email protected] |
+---------+

My solution:

Select Email from
Person
group by Email
having count(Email)>=2;

182. Duplicate Emails--solution

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182. Duplicate Emails--solution

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