Erreur SQL !
select code_uv,cip_prod,nom_prod,factures.nofacture,dbo.formatdate(factures.datefacture,'dd/mm/yyyy'),sum(quantite) from prod_factures left join factures on prod_factures.nofacture=factures.nofacture where index_assure= and factures.datefacture>=dateadd(year,-1,getdate()) and factures.index_typefacture not in (9,20,21,22,23) and code_uv in () group by code_uv,factures.datefacture,cip_prod,nom_prod,factures.nofacture,factures.index_typefacture order by CASE WHEN code_uv= THEN 0 END,factures.datefacture desc,factures.nofacture

CIP	Produits	Quantité	Date Facture	Ecart	N° Facture