TRANSFORM Sum(Table1.[MONTANT]) AS SommeDeMONTANT
SELECT Table1.[SECTEUR], Table1.[TYPE], Sum(Table1.[MONTANT]) AS [Total de MONTANT]
FROM Table1
GROUP BY Table1.[SECTEUR], Table1.[TYPE]
PIVOT Format([date],"mmm") In ("janv","févr","mars","avr","mai","juin","juil","août","sept","oct","nov","déc");