Database Design and Normalization

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What is the goal of physical database design?

Creating a design for storing data that provides adequate performance and ensures database integrity, security, and recoverability (correct)
Minimizing storage space
Ensuring data integrity only
Improving response time only

In the physical design process, what are some of the inputs needed?

Logical design diagrams
Integrity format and storage estimates (correct)
Database normalization rules
Data manipulation techniques

What is the main purpose of denormalization in database design?

Ensuring database security
Increasing data redundancy for improved query performance (correct)
Reducing redundancy and improving data consistency
Optimizing storage space usage

When selecting a data type for a field, what is one of the objectives?

To represent all possible values for the field (B) Signup and view all the answers

What does the physical database design process lead to?

File organizations and indexes (A) Signup and view all the answers

How does field design contribute to database efficiency?

By controlling data integrity through various techniques (C) Signup and view all the answers

What is a common reason for denormalization according to Rogers (1989)?

To increase chance of errors and inconsistencies (A) Signup and view all the answers

In denormalization, what situation involves two entities with a one-to-one relationship?

Reference data (D) Signup and view all the answers

What is a potential downside of denormalization as discussed in the text?

Force reprogramming when business rules change (C) Signup and view all the answers

When considering denormalization, what does the text warn about increasing?

Chance of errors and inconsistencies (B) Signup and view all the answers

In denormalization, what situation involves a many-to-many relationship with non-key attributes?

Common denormalization opportunities (A) Signup and view all the answers

What is an outcome that denormalization may introduce, as mentioned in the text?

Reintroduce anomalies (C) Signup and view all the answers

What is the primary benefit of denormalization?

Speeds up performance by reducing table lookups (D) Signup and view all the answers

How can denormalization impact the speed of a database system?

It speeds up performance by reducing the need for multiple table lookups (D) Signup and view all the answers

In denormalization, what is one common approach to handling missing data?

Substitute an estimate of the missing value (A) Signup and view all the answers

What is a key consideration when transforming normalized relations into denormalized physical record specifications?

Balancing data redundancy and query performance (C) Signup and view all the answers

Which operation in database design involves transforming normalized relations into non-normalized physical record specifications?

Denormalization (D) Signup and view all the answers

What can denormalization help achieve in terms of data handling?

Enhanced speed in retrieving data (D) Signup and view all the answers