CLIENT (NoClient, Nom, Adresse, Ville, Reduction) Primary key (NoClient) FACTURE (NoFact, NoClient, Date, Reduction) Primary key (NoFact) Foreign Key(NoClient) references CLIENT COMMANDE (NoFact, NoLigne, RefArt, Qte) Primary key (NoFact, NoLigne) Foreign Key(NoFact) references FACTURE ARTICLE (RefArt, Libellé, PU, TVA) Primary key (RefArt) PAIEMENT(NoFact, NoPaiement, Paiement) Primary key (NoFact, NoPaiement) Foreign Key(NoFact) references FACTURE