The following tables are modified and abbreviated versions of the database prese

Question

The following tables are modified and abbreviated versions of the database presented in our textbook: Instructors Table Last Name First Name Instructor ID Rank Woodward Jean Carson Scott LePorter Lucy Hamme Emanuel 1566543Professor Valerie Jonese 1228964 1252234 1478893 Professor Professor Associate Professor 1578223 Professor ScheduleTable Schedule ID Subject Instructor ID Room# 40198 ACC 1252234 H210 40211 ACC 1566543 H212 40243 ACC 1228964 H220 40344 BUS 1566543 H212 40496 ACC 1578223 H210 40603 BUS 40759 BUS 1566543 H220 40804 BUS 1252234 H210 40875 ACC 1566543 H212 40912 BUS 1578223 H220 40996 BUS 1252234 H212 1228964 H210 If a one-to-many relationship is established between the tables and referential integrity is enforced with both Cascade options selected, what will happen if you attempt to change the instructor ID irn the Instructors table for Scott Carson to 1252235?

Explanation / Answer

As the cascade option is selected for ON UPDATE, the update which is made on the instructor table, will evenutally reach to Schedule table too.
So option 2 is correct, that is the InsrtuctorId will be updated in both the places.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.