Which of the following is used to delete the entries in the referenced table when the tuple is deleted in course table?
A. Delete
B. Delete cascade
C. Set null
D. All of the mentioned
Answer:A
Which of the following is used to delete the entries in the referenced table when the tuple is deleted in course table?
A. Delete B. Delete cascade C. Set null D. All of the mentioned
Explanation:The delete “cascades” to the course relation, deletes the tuple that refers to the department that was deleted. 7. Domain constraints, functional dependency and referential integrity are special forms of _________.