commit 37c749c03048689865b77dbcffceb6cda67b991f
Author: Jacob Fritsche <jacob@jacob-fritsche.de>
Date:   Sat Jan 25 15:58:57 2025 +0100

    Tutorium 3 reationships

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
+;