Mysql select only unique rows (that appears only one time)

Question

Consider following data in table ->

1   example@hotmail.com
2   example12@hotmail.com
3   example@hotmail.com
4   example@hotmail.com

I want it to return only the following:

2   example12@hotmail.com

...and skip the duplicate values.

Answer 1

The query you want is

SELECT id, email, whatEverColumn 
FROM table 
WHERE email IN (SELECT email 
               FROM table 
               GROUP BY email 
               HAVING COUNT(id) = 1)

Answer 2

通过电子邮件分组并添加计数（电子邮件）= 1