5 Questions
List three properties of relations in the relational model terminology.
- Relation name is distinct from all other relation names in relational schema. 2. Each cell of relation contains exactly one atomic (single) value. 3. Each attribute has a distinct name.
What is the cardinality of a relation in the relational model terminology?
The cardinality is the number of tuples in a relation.
Explain the difference between a relation and an attribute in the context of the relational model terminology.
A relation is a table with columns and rows, while an attribute is a named column of a relation.
Explain the significance of the order of attributes and tuples in a relation in the relational model terminology.
The order of attributes has no significance, and theoretically, the order of tuples has no significance as well.
Define relational database schema and provide an example.
Relational database schema is a set of relation schemas, each with a distinct name. An example is R(R1,R2,R3,...,Rn).
Test your knowledge of relational model terminology with this quiz. Challenge yourself with questions about relations, attributes, domains, cardinality, and relational databases.
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