Podcast
Questions and Answers
Which of the following is true about normalization theory?
Which of the following is true about normalization theory?
- Normalization theory is a process that only applies to unnormalized relations.
- Normalization theory is a single-step process beginning with a normalized relation.
- Normalization theory is based on the observation that relations with certain properties are more effective in inserting, updating, and deleting data. (correct)
- Normalization theory is based on the observation that relations with certain properties are less effective in inserting, updating, and deleting data.
Which normal form requires that there is no transitive dependency between nonkey attributes?
Which normal form requires that there is no transitive dependency between nonkey attributes?
- First Normal Form (1NF)
- Boyce-Codd Normal Form (BCNF)
- Third Normal Form (3NF) (correct)
- Second Normal Form (2NF)
Which normal form requires that all determinants are candidate keys?
Which normal form requires that all determinants are candidate keys?
- First Normal Form (1NF)
- Second Normal Form (2NF)
- Boyce-Codd Normal Form (BCNF) (correct)
- Third Normal Form (3NF)
Which normal form allows for a functional dependency of nonkey attributes on the primary key and atomic values only?
Which normal form allows for a functional dependency of nonkey attributes on the primary key and atomic values only?
What are functional dependencies used for in relational designs?
What are functional dependencies used for in relational designs?
Flashcards
Normalization Theory
Normalization Theory
A set of rules for organizing data in a relational database to reduce data redundancy and improve data integrity.
3NF
3NF
Third Normal Form, a database design rule that avoids transitive dependencies between non-key attributes.
BCNF
BCNF
Boyce-Codd Normal Form, a database design rule requiring all determinants (columns that determine the value of another column) to be candidate keys.
1NF
1NF
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Functional Dependencies
Functional Dependencies
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Study Notes
Normalization Theory
- Normalization theory aims to minimize data redundancy and dependency in relational databases.
Normal Forms
- First Normal Form (1NF): All attributes must be atomic (cannot be divided further).
- Second Normal Form (2NF): No transitive dependency between non-key attributes (no indirect dependencies).
- Third Normal Form (3NF): All determinants are candidate keys (no transitive dependencies).
- Boyce-Codd Normal Form (BCNF): Allows functional dependency of non-key attributes on the primary key and atomic values only.
Functional Dependencies
- Functional dependencies are used in relational designs to establish relationships between attributes.
- They are essential in normalization to minimize data redundancy and improve data integrity.
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Description
Test your knowledge on database normalization with this quiz! Learn about the different normal forms, including first normal form (1NF), second normal form (2NF), and third normal form (3NF). Assess your understanding of the principles and benefits of normalization theory.
