diff --git a/insert.sql b/insert.sql
index 0378cc3..e0c360f 100644
--- a/insert.sql
+++ b/insert.sql
@@ -363,6 +363,11 @@ INSERT INTO Projet(titre, acronyme, annee_debut, annee_fin, duree, budget_Laas,
 --                                                                  --
 ----------------------------------------------------------------------
 
+INSERT INTO Participe VALUES (
+    1,
+    5
+);
+
 ----------------------------------------------------------------------
 --                                                                  --
 --                    Preside                                       --
diff --git a/request.sql b/request.sql
index 88eba79..0168253 100644
--- a/request.sql
+++ b/request.sql
@@ -136,7 +136,15 @@ GROUP BY pays
 ORDER BY nb_publi DESC LIMIT 1;
 
 
-
+-- Nathan tested
+SELECT * FROM Scientifique
+WHERE idScientifique IN (
+    SELECT idScientifique FROM (
+        SELECT idScientifique, COUNT(DISTINCT idProjet) AS nbProjets FROM Participe
+        GROUP BY idScientifique
+    ) AS Taux_Participation
+    WHERE nbProjets = 1
+);
 
 
 -- Yasmine QUESTION 19 Testé