Выберите дубликаты в SQL
SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1
Cucumberman
SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1
SELECT name, COUNT(email)
FROM users
GROUP BY email
HAVING COUNT(email) > 1• SELECT first_name, COUNT (first_name) FROM employees
GROUP BY first_name
HAVING (COUNT(first_name) > 1);/* This SQL Query will show each of those duplicate
rows individually instead of just grouping it */
SELECT username,email
FROM `users`
WHERE `username`
IN (SELECT username FROM `users` GROUP BY username HAVING COUNT(username) > 1)