Wie schreibe ich diese SQL-Anweisung?

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

bearbeiten Dies kann je nach verwendetem RDBMS und Größe des Datasets eine bessere Leistung erbringen. Probieren Sie beides aus und vergleichen Sie.

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