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What is the relational model based on?
What is the relational model based on?
- Trees
- Tables (correct)
- Arrays
- Graphs
In the relational model, what are the rows called?
In the relational model, what are the rows called?
- Clusters
- Sequences
- Entities
- Tuples (correct)
What is the name of the schema of a relation denoted by R(A1, A2,.An)?
What is the name of the schema of a relation denoted by R(A1, A2,.An)?
- Description
- Entity
- Relation (correct)
- Table
What does each column in a relation have, which gives an indication of the meaning of the data items in that column?
What does each column in a relation have, which gives an indication of the meaning of the data items in that column?
In the relational model, what does each attribute have?
In the relational model, what does each attribute have?
What does the term 'domain' refer to in the context of database design?
What does the term 'domain' refer to in the context of database design?
Which statement accurately describes a 'tuple' in the context of database relations?
Which statement accurately describes a 'tuple' in the context of database relations?
What does the term 'state' refer to in the context of relation in a database?
What does the term 'state' refer to in the context of relation in a database?
In database design, what does 'r(R)' represent?
In database design, what does 'r(R)' represent?
What is the primary role played by 'attribute name' in a domain within a relation?
What is the primary role played by 'attribute name' in a domain within a relation?
In the context of database design, what does 'dom(Cust-name) is varchar(25)' represent?
In the context of database design, what does 'dom(Cust-name) is varchar(25)' represent?
What is the significance of 'r(R) = {t1, t2, …, tn} where each ti is an n-tuple ti = where each vj element-of dom(Aj)' in the relational model?
What is the significance of 'r(R) = {t1, t2, …, tn} where each ti is an n-tuple ti = where each vj element-of dom(Aj)' in the relational model?
What does the term 'formally' imply in the statement 'Given R(A1, A2,., An) r(R) ⊂ dom (A1) X dom (A2) X.X dom(An)'?
What does the term 'formally' imply in the statement 'Given R(A1, A2,., An) r(R) ⊂ dom (A1) X dom (A2) X.X dom(An)'?
What role does the attribute name play in a domain within a relation?
What role does the attribute name play in a domain within a relation?
What does 'STATE The relation state is a subset of the Cartesian product of the domains of its attributes' imply in the context of database relations?
What does 'STATE The relation state is a subset of the Cartesian product of the domains of its attributes' imply in the context of database relations?
In the relational model, what mathematical concept is a relation based on?
In the relational model, what mathematical concept is a relation based on?
What is the formal term used for the data elements in each row of a relation?
What is the formal term used for the data elements in each row of a relation?
Which paper first proposed the relational model for large shared data banks?
Which paper first proposed the relational model for large shared data banks?
What is the attribute name called in the formal model of the relational model?
What is the attribute name called in the formal model of the relational model?
What is the name of the schema of a relation denoted by R(A1, A2,.An)?
What is the name of the schema of a relation denoted by R(A1, A2,.An)?
In the relational model, what is the informal definition of a relation?
In the relational model, what is the informal definition of a relation?
What does the term 'domain' refer to in the context of database design?
What does the term 'domain' refer to in the context of database design?
What is the primary role played by the 'attribute name' in a domain within a relation?
What is the primary role played by the 'attribute name' in a domain within a relation?
What does 'r(R)' represent in database design?
What does 'r(R)' represent in database design?
What is the significance of 'r(R) = {t1, t2, …, tn} where each ti is an n-tuple ti = where each vj element-of dom(Aj)' in the relational model?
What is the significance of 'r(R) = {t1, t2, …, tn} where each ti is an n-tuple ti = where each vj element-of dom(Aj)' in the relational model?
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