Podcast
Questions and Answers
Which term refers to the total number of tuples or rows present in a relation?
Which term refers to the total number of tuples or rows present in a relation?
- Cardinality (correct)
- Relation state
- Relational database schema
- Degree
What does a relational database schema consist of?
What does a relational database schema consist of?
- Tuples and rows
- Relation states and relation instances
- Relation schemas and integrity constraints (correct)
- Relation states and integrity constraints
What is a relation instance or relation state?
What is a relation instance or relation state?
- The set of integrity constraints in a database
- A set of tuples at a given moment of time (correct)
- A collection of relation schemas
- The total number of tuples or rows in a relation
Which company first implemented the relational model commercially?
Which company first implemented the relational model commercially?
Who is credited with inventing the relational data model?
Who is credited with inventing the relational data model?
What is a tuple in the context of a relational database?
What is a tuple in the context of a relational database?
What is the degree or arity of a relation?
What is the degree or arity of a relation?
The degree of this relation student is ______
The degree of this relation student is ______
The cardinality of this student relation is ______
The cardinality of this student relation is ______
A relational database schema is a set of ______ and a set of integrity constraints
A relational database schema is a set of ______ and a set of integrity constraints
Ted Cord invented the ______ data model in 1970
Ted Cord invented the ______ data model in 1970
The first commercial implementations of the relational model were by ______ and IBM
The first commercial implementations of the relational model were by ______ and IBM
A ______ is a set of possible values that you can input for an attribute
A ______ is a set of possible values that you can input for an attribute
A relation schema is made up of a relation name and a list of ______
A relation schema is made up of a relation name and a list of ______
