It's easy to find duplicates with one field
SELECT name,
COUNT(email)
FROM users
GROUP BY email
HAVING ( COUNT(email) > 1 )
So if we have a table
ID NAME EMAIL
1 John
[email protected]
2 Sam
[email protected]
3
Tom [email protected]
4 Bob
[email protected]
5
Tom [email protected]
This query will give us John, Sam,
Tom,
Tom because they all have the same e-mails.
But what I want, is to get duplicates with the same e-mails and names.
I want to get
Tom,
Tom.
I made a mistake, and allowed to insert duplicate name and e-mail values. Now I need to remove/change the duplicates. But I need to find them first.