Delete Duplicate Emails

Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id.

+----+------------------+
| Id | Email            |
+----+------------------+
| 1  | john@example.com |
| 2  | bob@example.com  |
| 3  | john@example.com |
+----+------------------+
Id is the primary key column for this table.

For example, after running your query, the above Person table should have the following rows:

+----+------------------+
| Id | Email            |
+----+------------------+
| 1  | john@example.com |
| 2  | bob@example.com  |
+----+------------------+

Note:

Your output is the whole Person table after executing your sql. Use delete statement.

# Write your MySQL query statement below
DELETE 
FROM
	person 
WHERE
	person.id NOT IN ( SELECT * FROM ( SELECT min( id ) FROM person GROUP BY email ) p )

标签：+----+------------------+,Emails,Duplicate,query,table,Id,com,example,Delete
来源： https://blog.csdn.net/a1135004584/article/details/110453036