Exercise

Pop quiz: The relational model

Which of the following is not part of the relational model?

Instructions

50 XP

Possible Answers

Each row or record in a table represents an instance of an entity type.
Each column in a table represents an attribute or feature of an instance.
Every table contains a primary key column, which has a unique entry for each row.
A database consists of at least 3 tables.
There are relations between tables.