Question
Download Solution PDFThe degree of a relation in database is
Answer (Detailed Solution Below)
Option 2 : the number of attribute in the relation
Detailed Solution
Download Solution PDFThe correct answer is the number of attributes in the relation.
Key Points
- The degree of a relation (or table) in a database refers to the number of attributes (or columns) that the relation contains.
- Each attribute represents a property or characteristic of the entity that the relation describes.
- For example, in a student relation, attributes could include student ID, name, age, and major.
- The degree of the student relation would be 4 if there are four attributes.
- This term is different from the cardinality of a relation, which refers to the number of tuples (or rows) in the relation.
Additional Information
- Understanding the degree of a relation is essential in database design, as it impacts how data is structured and accessed.
- Database schemas define the structure of relations, including their degree and the data types of their attributes.
- Normalization techniques in database design aim to optimize the degree and minimize redundancy.
- Relational database management systems (RDBMS) use the schema to enforce data integrity and support query optimization.