lsqlthw ex8

lsqlthw-remnants/ex8.sql

@@ -0,0 +1,18 @@
+DELETE FROM pet WHERE id IN (
+    SELECT pet.id
+    FROM pet, person_pet, person
+    WHERE
+    person.id = person_pet.person_id AND
+    pet.id = person_pet.pet_id AND
+    person.first_name = "Zed"
+);
+
+SELECT * FROM pet;
+SELECT * FROM person_pet;
+
+DELETE FROM person pet
+    WHERE pet id NOT IN (
+        SELECT id FROM pet
+    );
+
+SELECT * FROM person_pet;