Joined Relations-Examples course natural right outer join prereg course id title dept name credits prereq id BIO-301 Genetics Biology 4 BIO-101 CS-190 Game Design Comp.Sci. 4 CS-101 CS-347 null null null CS-101 course full outer join prereg using (course_id) course id title dept name credits prereq id BIO-301 Genetics Biology 4 BI○-101 CS-190 Game Design Comp.Sci. 4 CS-101 CS-315 Robotics Comp.Sci. 3 null CS-347 null null null CS-101 Database System Concepts-6th Edition 4.11 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 4.11 ©Silberschatz, Korth and Sudarshan th Edition Joined Relations – Examples course natural right outer join prereq course full outer join prereq using (course_id)