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1) chaque entité devient une table2) les attributs deviennent des colonnes3) (-,1) et (-,1) : on prend une clé primaire et on la met dans l'autre table (-,n) et (-,n) : on crée une nouvelle table avec les deux clés primaires (-,1) et (-,n) : on prend la clé primaire du (-,n) et on la met dans la table du (-,1) relation avec attribut : on crée une nouvelle table avec les deux clés primaires et l'attribut

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