You are given an E-R diagram with two entities,ORDER and CUSTOMER,as shown above,and are asked to draw the relationship between them.If a given customer can place only one order and a given order can be placed by at most one customer,which of the following should be indicated in the relationship symbol between the two entities?
A)0:1
B)1:1
C)1:N
D)N:1
E)N:M

Question

Quizplus · Accepted Answer

The relationship between ORDER and CUSTOMER is one-to-one, meaning that each customer can place only one order and each order can be placed by only one customer. The relationship symbol for a one-to-one relationship is 1:1.

You Are Given an E-R Diagram with Two Entities,ORDER and CUSTOMER,as