Database Normalization Process

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What is the main purpose of Normalization?

To minimize relationships

To organize data in the database (correct)

To increase data redundancy

To create anomalies

Which type of anomaly does Insertion Anomaly refer to?

Update Anomaly

Inability to Insert Data Anomaly (correct)

Data Integrity Anomaly

Insertion of Redundant Data Anomaly

What does Normalization aim to eliminate?

Insertion Anomalies (correct)

Data Integrity

Relationships

Data Security

Why is it important to remove anomalies through Normalization?

To avoid data redundancy and integrity problems Signup and view all the answers

Which of the following does Normalization NOT help with?

Increasing update anomalies Signup and view all the answers

What happens when there is a Deletion Anomaly in a database?

An unintended loss of some important data occurs Signup and view all the answers

What is the main characteristic of a relation in 1NF?

Contains atomic values Signup and view all the answers

Which normal form requires that all non-key attributes be fully functional dependent on the primary key?

2NF Signup and view all the answers

What does BCNF stand for in database normalization?

Boyce Codd's Normal Form Signup and view all the answers

Which normal form focuses on the absence of multi-valued dependencies?

4NF Signup and view all the answers

What is one of the disadvantages of normalization mentioned in the text?

Performance degrades with higher normal forms Signup and view all the answers

What does First Normal Form (1NF) disallow?

Multi-valued attributes Signup and view all the answers

In the given context, if there is a transitive dependency for non-prime attributes, what form must the relation be in?

Third normal form Signup and view all the answers

What are the conditions that need to be satisfied for a relation to be in third normal form?

X is a super key, Y is a prime attribute Signup and view all the answers

In the EMPLOYEE_DETAIL table, which set of attributes forms a candidate key?

{EMP_ID} Signup and view all the answers

Why were EMP_CITY and EMP_STATE moved to the EMPLOYEE_ZIP table in the given scenario?

To avoid transitive dependency Signup and view all the answers

Which normal form does Boyce Codd normal form (BCNF) relate to in terms of relational database normalization?

Third normal form Signup and view all the answers

What makes Boyce Codd normal form (BCNF) stricter than 3NF?

It enforces functional dependencies more rigorously Signup and view all the answers

What is a lossless join decomposition in a database?

A decomposition that preserves all the data without any loss Signup and view all the answers

What does dependency preservation mean in the context of database decompositions?

Ensuring that at least one decomposed table satisfies every dependency Signup and view all the answers

Why is dependency preservation an important constraint in database design?

It ensures data integrity and consistency Signup and view all the answers

What term is used to describe the dependency between BIKE_MODEL and MANUF_YEAR?

Multidetermined Signup and view all the answers

In a lossless join decomposition, what must be true about the decomposed tables?

At least one table must satisfy every dependency Signup and view all the answers

What is the purpose of relational decomposition in the relational model?

To break tables into multiple tables Signup and view all the answers

How can dependencies of a relation be preserved in its decomposed tables?

By distributing dependencies across the tables Signup and view all the answers

What problem may arise if a relation in the relational model is not in an appropriate normal form?

Loss of information Signup and view all the answers

What happens if a decomposition fails to preserve all dependencies of the original relation?

Data integrity is compromised Signup and view all the answers

In database design, what issues can decomposition help to eliminate?

Anomalies, inconsistencies, and redundancy Signup and view all the answers

How is a lossless decomposition defined in database design?

When all information is retained during decomposition Signup and view all the answers

What does a lossless decomposition guarantee in terms of the join of relations?

Results in the same relation as the original Signup and view all the answers