Problemes lors de l'execution du sql

BusTP2.sql

-DROP TABLE VILLES;
-
+DROP TABLE Réservations CASCADE CONSTRAINTS;
+DROP TABLE Clients CASCADE CONSTRAINTS;
+DROP TABLE Tarifs CASCADE CONSTRAINTS;
+DROP TABLE Etapes CASCADE CONSTRAINTS;
+DROP TABLE Trajets CASCADE CONSTRAINTS;
+DROP TABLE Bus CASCADE CONSTRAINTS;
+DROP TABLE Villes CASCADE CONSTRAINTS;
 
 CREATE TABLE Villes (
     NomV VARCHAR2(50) PRIMARY KEY NOT NULL
-)
+);
 
 CREATE TABLE Bus (
     NumB INT PRIMARY KEY NOT NULL,
     CapacitéB INT NOT NULL,
     CONSTRAINT chk_capacity Check(CapacitéB > 0)
-)
+);
 
 CREATE TABLE Trajets (
     NumT INT PRIMARY KEY NOT NULL,
     NumB INT NOT NULL,
     FOREIGN KEY (NumB) REFERENCES Bus(NumB)
-)
+);
 
 CREATE TABLE Etapes (
     NumT INT NOT NULL,
@@ -26,7 +31,7 @@ CREATE TABLE Etapes (
     FOREIGN KEY (NumT) REFERENCES Trajets(NumT),
     FOREIGN KEY (NomV) REFERENCES Villes(NomV),
     CONSTRAINT chk_duree_arret CHECK(DateD >= DateA + 5/1440)
-)
+);
 
 CREATE TABLE Tarifs (
     VilleD VARCHAR2(50) NOT NULL,
@@ -37,13 +42,13 @@ CREATE TABLE Tarifs (
     FOREIGN KEY (VilleA) REFERENCES Villes(NomV),
     CONSTRAINT chk_prix Check(Prix > 0),
     CONSTRAINT chk_villes_diff CHECK (VilleA <> VilleD)
-)
+);
 
 CREATE TABLE Clients (
     NumC INT PRIMARY KEY NOT NULL,
     NomC VARCHAR2(50) NOT NULL,
     AdresseC VARCHAR2(50) NOT NULL
-)
+);
 
 CREATE TABLE Réservations (
     NumR INT PRIMARY KEY NOT NULL,
@@ -57,4 +62,4 @@ CREATE TABLE Réservations (
     FOREIGN KEY (NumT, VilleA) REFERENCES Etapes(NumT, NomV),
     FOREIGN KEY (VilleD, VilleA) REFERENCES Tarifs(VilleD, VilleA),
     CONSTRAINT chk_places CHECK (Nbplaces > 0)
-)
\ No newline at end of file
+);
\ No newline at end of file