Problème UNION et ORDER BY dans MySQL

Essayez :

$getquery = "(SELECT * 
FROM highscore 
WHERE score >= '$score'
ORDER BY score ASC
LIMIT 6)

UNION ALL -- guaranteed to be beneficial in this case as Johan commented

(SELECT * 
FROM highscore 
WHERE score < '$score'
ORDER BY score DESC
LIMIT 5)";

Voir le commentaires à ma réponse sur la question connexe .
Ou consulter le manuel fin .