diff --git a/EXOS/Exam2020-all.tex b/EXOS/Exam2020-all.tex
index 1bc135a..7826438 100644
--- a/EXOS/Exam2020-all.tex
+++ b/EXOS/Exam2020-all.tex
@@ -537,7 +537,7 @@ Messages à prévoir :
  \item L'heure de d\'ebut doit \^etre comprise entre 9h et 17h
  \end{itemize}
  
-% \lstinputlisting{exo1-PL.sql}
+\lstinputlisting{exo1-PL.sql}
 \end{exercice}
 
 \begin{exercice}[MF2] (15 points)
diff --git a/EXOS/exo1-PL.sql b/EXOS/exo1-PL.sql
new file mode 100644
index 0000000..91c426d
--- /dev/null
+++ b/EXOS/exo1-PL.sql
@@ -0,0 +1,46 @@
+drop table tresultat purge;
+create table tresultat(ligne varchar2(200));
+
+variable vnumCreneau char(2)
+prompt num Creneau?
+accept vnumCreneau
+variable vhdebut number
+prompt heure debut?
+accept vhdebut
+
+declare
+dnumCreneau char(2):='&vnumCreneau';
+dhdebut number:=&vhdebut; 
+
+dmessage varchar2(200);
+probleme exception;
+dcpt number;
+
+begin	
+	dmessage:='ERREUR: num creneau déjà attribué';
+	select count(*) into dcpt
+		from creneau
+		where numCreneau=dnumCreneua;
+	if dcpt=1
+	then insert into tresultat values (dmessage);
+	else dmessage:='Le debut doit etre en 10h et 17h';
+		if (dvhdebut <9) or (dvhdebut >17) 
+		then  raise probleme;
+		else dmessage:='le creneau existe';
+			select count(*) into dcpt
+	                from creneau 
+			where heureDebut=dhdebut;
+			id dcpt=0 then raise probleme;
+			else 
+			insert into reservation values(dnumCreneau,dvhdebut);
+			commit;
+			insert into tresultat values ('Le creneua a été enregistrée :');
+			end if;
+		end if;
+	end if;
+	exception
+	when probleme then insert into tresultat values (dmessage);
+end;
+.
+/
+select * from tresultat;