Podcast
Questions and Answers
What is the main requirement for full functional dependency in a table?
What is the main requirement for full functional dependency in a table?
- Attributes must be partially dependent on the primary key
- Every attribute must be fully and functionally dependent on the primary key (correct)
- Transitive dependencies should exist between attributes
- Attributes must be dependent on non-key attributes
Which concept in database management ensures the consistency of relationships between tables?
Which concept in database management ensures the consistency of relationships between tables?
- Conceptual Model Process
- Data Modeling
- Third Normal Form (3NF)
- Referential Integrity (correct)
What needs to be eliminated to achieve the Third Normal Form (3NF)?
What needs to be eliminated to achieve the Third Normal Form (3NF)?
- Transitive dependencies (correct)
- Key dependencies
- Partial dependencies
- Functional dependencies
What is a characteristic of transitive dependence?
What is a characteristic of transitive dependence?
Which process involves making diagrams for software or database layout?
Which process involves making diagrams for software or database layout?
What is the primary purpose of data normalization in a database?
What is the primary purpose of data normalization in a database?
Which of the following is NOT a reason for the normalization process?
Which of the following is NOT a reason for the normalization process?
What are the types of anomalies that can be encountered while using flat files?
What are the types of anomalies that can be encountered while using flat files?
Which rule defines a table to be in the First Normal Form (1NF)?
Which rule defines a table to be in the First Normal Form (1NF)?
What is a key requirement for the Second Normal Form (2NF)?
What is a key requirement for the Second Normal Form (2NF)?
Which of the following is NOT an example of a modification anomaly?
Which of the following is NOT an example of a modification anomaly?
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Study Notes
Functional Dependency
- Full functional dependency in a table requires that if A → B, then A functionally determines B, and A contains a minimal set of attributes necessary to functionally determine B.
Database Management
- Referential integrity is the concept that ensures the consistency of relationships between tables.
Data Normalization
- To achieve the Third Normal Form (3NF), transitive dependencies need to be eliminated.
Transitive Dependence
- A characteristic of transitive dependence is that if A → B and B → C, then A → C.
Database Design
- Data modeling is the process that involves making diagrams for software or database layout.
Data Normalization (Purpose)
- The primary purpose of data normalization in a database is to minimize data redundancy and dependency.
Normalization Process
- Not having a unique primary key is NOT a reason for the normalization process.
Flat Files
- Insertion, deletion, and update anomalies are the types of anomalies that can be encountered while using flat files.
First Normal Form (1NF)
- The rule that defines a table to be in the First Normal Form (1NF) is that all the tables must have distinct rows, and each column must have a single value.
Second Normal Form (2NF)
- A key requirement for the Second Normal Form (2NF) is that a table must be in the First Normal Form (1NF), and all non-prime attributes must depend on the entire primary key.
Modification Anomaly
- Changing the price of a specific product is NOT an example of a modification anomaly.
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