Ajout contrainte UNIQUE(position, ligne) dans Arret

9aec3881 · Clement Lucas · 2373d38e · 9aec3881
Commit 9aec3881 authored May 20, 2021 by Clement Lucas
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SQL/TABLE.sql SQL/TABLE.sql +2 -1

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--- a/SQL/TABLE.sql
+++ b/SQL/TABLE.sql
@@ -42,7 +42,8 @@ CREATE TABLE Arret (
    position INTEGER NOT NULL,
    gare INTEGER REFERENCES Gare(id_gare) NOT NULL,
    ligne INTEGER REFERENCES Ligne(id_ligne) NOT NULL,
-    PRIMARY KEY(id_arret)
+    PRIMARY KEY(id_arret),
+    UNIQUE (position, ligne)
 );
 ---Calendrier (#jour : {lundi, mardi, mercredi, jeudi, vendredi, samedi, dimanche})