5.56 Analyzing Subscription Form for Ultimate Database Design Fun!

What are the differences between creating a model with one entity versus two entities based on the subscription form?

A. How would you structure a model with one entity for the subscription form?

B. How would you structure a model with two entities for the subscription form?

C. When do you prefer the model with one entity over the model with two entities?

D. When do you prefer the model with two entities over the model with one entity?

Analysis of Subscription Form Models

In model A, we can create a single entity called "Subscription" with the identifier "subscription_id" and attributes such as "duration", "price", "start_date", and "end_date". This model is suitable for a simple subscription structure where customers do not need to be associated with specific subscriptions.

In model B, we can create two entities: "Customer" with attributes like "customer_id", "name", "address", and "email", and "Subscription" with features like "subscription_id", "duration", "price", "start_date", and "end_date". The relationship can be named "has_subscription" with a one-to-many cardinality from "Customer" to "Subscription". This model is preferred when customers need to be linked with specific subscriptions.

Details of Model Preferences

Model A is preferred when there is a straightforward subscription structure without the requirement to connect customers with distinct subscriptions. This model works well for customers with a fixed subscription without individual customization.

Model B is the optimal choice when customers are meant to be associated with specific subscriptions. This model provides more flexibility as customers can have multiple subscriptions, and each subscription can have its unique attributes and relationship with the customer.