Procédons étape par étape :
Sélectionnez les matchs gagnés à domicile et le score à domicile :
SELECT COUNT(*) as wins, SUM(G.home_score) as score FROM games G WHERE
G.team_id = T.team_id #See 3. query and you'll understand
G.home_score > away_score
Appelons ce résultat HOME_GAMES.
Sélectionnez les matchs gagnés et le score des matchs à l'extérieur :
SELECT COUNT(*) as wins, SUM(G.away_score) as score FROM games G
WHERE
G.team_id = T.team_id #See 3. query and you'll understand
G.away_score > G.home_score
Appelons ce résultat AWAY_GAMES.
Sélectionnez le nombre total de parties gagnées et le score total :
SELECT (A.wins + H.wins) AS total_wins, (A.score + H.score) AS total_score FROM
(AWAY_GAMES) AS A, (HOME_GAMES) AS H, teams T
ORDER BY total_wins, total_score
==> Rassemblez le tout en remplaçant AWAY_GAMES et HOME_GAMES :
SELECT (A.wins + H.wins) AS total_wins, (A.score + H.score) AS total_score FROM
(SELECT COUNT(*) as wins, SUM(G.away_score) as score FROM games G
WHERE
G.team_id = T.team_id #See 3. and you'll understand
G.away_score > G.home_score) AS A,
(SELECT COUNT(*) as wins, SUM(G.home_score) as score FROM games G
WHERE
G.team_id = T.team_id #See 3. and you'll understand
G.home_score > away_score) AS H,
teams T
ORDER BY total_wins, total_score