MySQL – Fetch duplicate records

If your database table having duplicate records and you want to remove all duplicates, this query will help you to find out duplicate records in a table. You can check the records based on any specific field.

FROM mdl_user
WHERE email IN (
	SELECT email
	FROM mdl_user
	GROUP BY email
	HAVING count(email) > 1
ORDER BY email

This query will find all the records in mdl_user table having duplicate emails.