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Answer to Question #75639 in Databases | SQL | Oracle | MS Access for Jonny
Question #75639
When mapping a Conceptual Model to a Relational Model, a simple identifier maps to ...
a composite attribute.
a column.
a simple attribute.
a simple key.
a composite attribute.
a column.
a simple attribute.
a simple key.
Expert's answer
a simple key
A simple identifier consists of one attributе and uniquely identifies an instance of the entity. When mapping a Conceptual Model to a Relational Model, a simple identifier maps to a simple key. Simple key consists of one column and uniquely identifies a row.
A simple identifier consists of one attributе and uniquely identifies an instance of the entity. When mapping a Conceptual Model to a Relational Model, a simple identifier maps to a simple key. Simple key consists of one column and uniquely identifies a row.
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