What is a primary key?
A. A field (or group of fields) that uniquely identifies a given entity in a table.
B. A primary key of one table that appears as an attribute in another table and acts to provide a logical
relationship among the two tables.
C. Characteristics or properties of an entity.
D. A field (or group of fields) that uniquely identifies a given attribute in a table.
A. A field (or group of fields) that uniquely identifies a given entity in a table.
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