From 37c749c03048689865b77dbcffceb6cda67b991f Mon Sep 17 00:00:00 2001
From: Jacob Fritsche <jacob@jacob-fritsche.de>
Date: Sat, 25 Jan 2025 15:58:57 +0100
Subject: [PATCH] Tutorium 3 reationships

---
 tutorium_3_relationships | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 tutorium_3_relationships

diff --git a/tutorium_3_relationships b/tutorium_3_relationships
new file mode 100644
index 0000000..3bfe052
--- /dev/null
+++ b/tutorium_3_relationships
@@ -0,0 +1,23 @@
+-- 1-to-1-relationship
+SELECT *
+	FROM "IDBS01_Q12025"."Population" AS population
+	inner join "IDBS01_Q12025"."Country" as ctry
+		on ctry.code = population.country
+;
+
+-- 1-to-cn-relationship
+SELECT *
+	FROM "IDBS01_Q12025"."Country" as ctry
+	FULL OUTER JOIN "IDBS01_Q12025".borders as borders
+		ON ctry.code = borders.country1
+;
+
+
+-- 1-to-cn-relationship
+SELECT *
+	FROM "IDBS01_Q12025"."Country" as ctry
+	LEFT OUTER JOIN "IDBS01_Q12025"."geo_Desert" AS geodes
+		ON ctry.code = geodes.country
+	LEFT OUTER JOIN "IDBS01_Q12025"."Desert" AS des
+		on geodes.desert = des.name
+;