Recall & Review
beginner
What is normalization in databases?
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
Click to reveal answer
beginner
Why does normalization reduce data redundancy?
Normalization breaks data into smaller tables and links them, so the same data is not stored multiple times.
Click to reveal answer
intermediate
How does normalization improve data integrity?
By organizing data into related tables, normalization ensures updates happen in one place, preventing inconsistent data.
Click to reveal answer
beginner
What problems can occur without normalization?
Without normalization, databases can have duplicate data, inconsistent updates, and wasted storage space.
Click to reveal answer
intermediate
How does normalization help when updating data?
Normalization means you update data in one place only, so changes are consistent everywhere the data is used.
Click to reveal answer
What is the main goal of normalization?
✗ Incorrect
Normalization organizes data to reduce duplication and redundancy.
Which problem does normalization help prevent?
✗ Incorrect
Normalization helps keep data consistent by avoiding duplicates.
How does normalization affect storage space?
✗ Incorrect
By removing duplicate data, normalization saves storage space.
What happens when you update data in a normalized database?
✗ Incorrect
Normalization ensures updates happen in one place to keep data consistent.
Which of these is NOT a benefit of normalization?
✗ Incorrect
Normalization can sometimes slow queries due to joins; its main benefits are data integrity and reduced redundancy.
Explain why normalization is important for maintaining consistent data.
Think about what happens if the same data is stored in many places.
You got /3 concepts.
Describe the problems that can arise if a database is not normalized.
Imagine updating a phone number stored in many tables separately.
You got /4 concepts.