The ER model refers to a specific table row as an entity instance.
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Q2: All simple attributes are also single-valued.
Q4: The word "entity" in the ER model
Q5: In the Chen model,a multivalued attribute is
Q8: The ER diagram represents the conceptual database
Q9: In an ER diagram,primary keys are usually
Q10: The Crow's Foot model is less implementation-oriented
Q11: In both the Chen and Crow's Foot
Q12: Ideally,a primary key is composed of several
Q13: A composite identifier is a primary key
Q19: Software vendors have adopted the Chen representation
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