Different people view data differently. How can data about customer contact details and data about their orders be stored in a database?

Question

BlackTom AI · Accepted Answer

Customer contact details and orders represent two distinct entities: Customer and Order. Each has its own attributes and lifecycle, so they are best represented separately in a relational database.

1) Relevant knowledge points and concepts
- Entity: a real-world object or concept represented as a table (e.g., Customer, Order).
- Attribute: a property of an entity (e.g., Customer.name, Customer.email, Order.date, Order.total).
- Primary key: unique identifier for a record (e.g., customer_id, order_id).
- Foreign key: a field linking one table to another (e.g., Order.customer_id).
- Normalization: organizing data to avoid duplication and ensure consistency.

2) Step-by-step reasoning process
- Identify entities: contact details describe a Customer; order details describe an Order. They are different conceptual objects.
- Decide storage: create one table per entity so attributes are grouped logically and to prevent repeated customer data for every order.
- Link them: if one customer can have many orders (one-to-many), include customer_id in the Orders table as a foreign key to relate each order to its customer.

3) Intermediate design steps / example
- Customers table: customer_id (PK), name, email, phone, address.
- Orders table: order_id (PK), order_date, total_amount, customer_id (FK → Customers.customer_id).
- This design stores customer data once and links multiple orders to the same customer.

4) Why the correct answer is correct
- Using at least two tables reflects the two entities and supports relational linking, reduces redundancy, and maintains data integrity (via PK/FK constraints).

5) Why the other options are incorrect
- Single table: would mix unrelated attributes, cause duplication and update anomalies.
- “Only the customer data can be stored”: false — databases store many entity types including orders.
- “Customer table and the orders as a relationship”: orders are entities themselves (not just a relationship); they should be stored in a table and related via a foreign key.

6) Conclusion
- Therefore the correct approach is “Using at least two tables because there are two entities,” which matches the provided answer.

Different people view data differently. How can data about customer contact details and data about their orders be stored in a database?单项选择题

类似问题

What is the primary purpose of a Composite Usage Map in the context of physical database design?

Partial specialization indicates that:

Why is it important that a database is designed correctly before it is created?

Which of the diagrams below matches both statements: A. A Patient can receive 0 to many Prescriptions B. A Prescription belongs to one and only one Patient

企业应用程序基于组织范围内的数据定义。

Logical design is the process of implementing the logical data model in a specific database management system (DBMS).

Which of the following best describes the primary role of Business Rules during the database design phase?"

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单