La palme a grosmethos k'a trouve
BRAVO et MERCI      
  SELECT LB.LIBELLE,SUM(DUREE_APPEL),AVG(DUREE_APPEL),COUNT(DUREE_APPEL),COUNT(LB.LIBELLE)
        ,SUM(MONTANT),AVG(MONTANT)      
         FROM ST_HISTO_STAT ST, ST_LIBELLE LB
        WHERE
        ST.ID_PREFIX_APPELANT = LB.ID_LIBAUTO AND
        TO_CHAR(DATE_APPEL,'DD/MM/YYYY') BETWEEN '01/01/2001' AND '22/06/2001'
        GROUP BY LB.LIBELLE ORDER BY LB.LIBELLE;