6 Questions
What is the value of the Index property for Customer.Customer ID?
Primary Key
What is the value of the Index property for Subscription.Customer ID?
Foreign Key
State the type of each relation and justify your answer according to Indices.
Customer - Subscription: One-to-Many (1:M), based on Primary-Foreign Key relationship. Library - Subscription: One-to-Many (1:M), based on Primary-Foreign Key relationship. Type - Customer: One-to-Many (1:M), based on Primary-Foreign Key relationship.
Give the Data type and size for Customer ID in Subscription Table.
Data Type: Autonumber, Size: Not applicable
Give the Data type and size for Library ID in Subscription Table.
Data Type: Number, Size: Integer
Explain the concept of 'Cascade Delete Related Records' in the context of Customer - Subscription relation.
When a record is deleted in the Customer table, all related records in the Subscription table for that customer are automatically deleted.
Test your understanding of tables and relationships in a database scenario involving Customer, Library, and Subscription tables with enforced referential integrity and cascade delete constraints.
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