SELECT user.name, user.subject
FROM user
INNER JOIN (
SELECT name, COUNT(1) AS occurrences
FROM user
GROUP BY name
) AS user_occurrences
ON user.name = user_occurrences.name
ORDER BY user_occurrences.occurrences DESC, user.name ASC, user.subject ASC
LIMIT 4
edit Ini mungkin berkinerja lebih baik, tergantung pada RDBMS yang Anda gunakan dan ukuran kumpulan data. Coba keduanya dan bandingkan.
SELECT user.name, user.subject FROM user INNER JOIN user AS user_occurrences ON user.name = user_occurrences.name GROUP BY user.name --, user.subject Second GROUP BY not needed on MySQL, but it should logically be there ORDER BY COUNT(user_occurrences.subject) DESC, user.name ASC, user.subject ASC LIMIT 4