Podcast
Questions and Answers
In the relational model, what are the data elements in each row called?
In the relational model, what are the data elements in each row called?
- Tuples (correct)
- Attributes
- Rows
- Columns
What is the key of a relation in the context of a table?
What is the key of a relation in the context of a table?
- Sequential number
- Column header
- Attribute name
- Value that uniquely identifies a row (correct)
What is the concept that gives an indication of the meaning of the data items in a column?
What is the concept that gives an indication of the meaning of the data items in a column?
- Column header or Attribute (correct)
- Rows
- Relations
- Tuples
What do the data elements in each row of a relational model represent?
What do the data elements in each row of a relational model represent?
In the context of a table, what is the key that uniquely identifies each row?
In the context of a table, what is the key that uniquely identifies each row?
What is the formal term for the column header that gives an indication of the meaning of the data items in that column?
What is the formal term for the column header that gives an indication of the meaning of the data items in that column?
What are sometimes assigned as keys to identify the rows in a table, besides the actual data values?
What are sometimes assigned as keys to identify the rows in a table, besides the actual data values?
In the context of a table, what is sometimes assigned as keys to identify the rows and is called an artificial key or surrogate key?
In the context of a table, what is sometimes assigned as keys to identify the rows and is called an artificial key or surrogate key?
What does EER stand for in the context of database modeling?
What does EER stand for in the context of database modeling?
What are some of the additional concepts included in the EER model?
What are some of the additional concepts included in the EER model?
How does EER extend ER diagrams to represent additional subgroupings of entities?
How does EER extend ER diagrams to represent additional subgroupings of entities?
What are some fundamental concepts used in conceptual modeling with the EER model?
What are some fundamental concepts used in conceptual modeling with the EER model?
