This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Chapter 4 Homework - ERD Enter your answers to the questions below in a word processor. Then log into Blackboard and enter your answers in the appropriate web page accessed from the Homework folder. Bring your printout to class for discussion and save it until you see your grade in OPE. Consider the relationship between advisor and student in each of the following ERDs. Explain what the cardinality of each ERD means. 1. N:1 Adv isor S tuden t Many to one. Student can have many advisors. Advisors must have at least two students and a student are required to have at least one advisor 2. N:1 Adv isor S tuden t Students can have multiple advisors and at have at least one; an advisor has to have at least one student, but is not required to have a relationship with him or her. This is confusing me, why is there an oval that says that an advisor need not have a relationship with a student but is required to have at least one student....
View Full Document
- Spring '07
- Entity-relationship model, advisor