Update create_table.sql

create_table.sql

 Create table Client (
-	ID_Client INT NOT NULL,
+	ID_Client INT UNIQUE NOT NULL,
 	Nom varchar(30) NOT NULL,
 	Prenom varchar(30) NOT NULL,
 	Date_de_naissance date NOT NULL,
@@ -10,12 +10,12 @@ Create table Client (
 );
 
 Create table Classe_animal (
-	ID_classes INT NOT NULL PRIMARY KEY,
+	ID_classes INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom varchar(30) NOT NULL
 );
 
 Create table Veterinaire (
-	ID_personnel INT NOT NULL PRIMARY KEY,
+	ID_personnel INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom varchar(30) NOT NULL,
 	prenom varchar(30) NOT NULL,
 	Date_de_naissance date NOT NULL,
@@ -26,7 +26,7 @@ Create table Veterinaire (
 );
 
 Create table Assistant (
-	ID_personnel INT NOT NULL PRIMARY KEY,
+	ID_personnel INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom varchar(30) NOT NULL,
 	prenom varchar(30) NOT NULL,
 	Date_de_naissance date NOT NULL,
@@ -37,14 +37,14 @@ Create table Assistant (
 );
 
 Create table Espece (
-	ID_espece INT NOT NULL PRIMARY KEY,
+	ID_espece INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom varchar(30) NOT NULL,
 	Classe INT, 
     foreign key(Classe) references Classe_animal(ID_classes)
 );
 
 Create table Animal (
-	ID_Animal INT NOT NULL PRIMARY KEY,
+	ID_Animal INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom varchar(30) NOT NULL,
 	Poids FLOAT NOT NULL,
 	Taille FLOAT NOT NULL,
@@ -58,12 +58,12 @@ Create table Animal (
 );
 
 Create table Effets_secondaires (
-	ID_effet_secondaire INT NOT NULL PRIMARY KEY,
+	ID_effet_secondaire INT UNIQUE NOT NULL PRIMARY KEY,
 	Effets varchar(100) NOT NULL
 );
 
 Create table Medicament (
-	ID_Medicament INT NOT NULL PRIMARY KEY,
+	ID_Medicament INT UNIQUE NOT NULL PRIMARY KEY,
 	Nom_de_molecule varchar(30) NOT NULL,
 	Description varchar(100) NOT NULL
 );
@@ -85,7 +85,7 @@ Create table Med_correspond_Ani (
 );
 
 Create table Traitement (
-	ID_Traitement INT NOT NULL PRIMARY KEY,
+	ID_Traitement INT UNIQUE NOT NULL PRIMARY KEY,
 	Debut TIME NOT NULL,
 	Duree TIME NOT NULL,
 	Nom varchar(30) NOT NULL,