In the E-R model shown below, if entity A represents customers of an investment bank and entity B represents bank accounts, which of the following statements accurately describes their relationship? 单项选择题

题目图片
A

A customer can open multiple accounts, but each account is associated with only one customer.

B

A customer can open multiple accounts, and each account can be jointly owned by multiple customers.

C

Each customer can open only one account, and each account is assigned to only one customer.

D

Each customer can own only one account, but an account can be shared by multiple customers.

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

Scenario: CUSTOMER (CustomerID PK) and ORDER (OrderID PK). One customer may place many orders. Where should the foreign key go?

Consider an association between a Customers class and a Sale class in a Unified Modeling Language (UML) Class diagram. The multiplicities next to the Customers class are 1..1 and the multiplicities next to the Sale class are 0..*. Which of the following is the best way to implement that association in your database?

To correctly represent optional participation in 1:N relationship between Advisor:Student relations where a student can have one advisor but is not required to have one and an Advisor can advice to any number of students, do the following: 

Project A has a required return on 9.2 percent and cash flows of −$87,000, $32,600, $35,900, and $43,400 for Years 0 to 3, respectively. Project B has a required return of 12.7 percent and cash flows of −$85,000, $14,700, $21,200, and $89,800 for Years 0 to 3, respectively. Which project(s) should you accept based on net present value if the projects are mutually exclusive?

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！