What is a primary key?
A) a field that uniquely identifies a given record 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 between the two tables
C) a table that uniquely identifies a given record in a field
D) a foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records
Correct Answer:
Verified
Q17: What is a technique for documenting the
Q18: What occurs between two entities in which
Q19: What has only a single value of
Q20: Which of the following is a type
Q21: What exists to represent the relationship between
Q22: What expresses the specific number of instances
Q23: What is a foreign key?
A)a field that
Q24: What is composed of rows and columns
Q25: What is a collection of related data
Q27: What is a characteristic of a table?
A)field
B)table
C)record
D)key
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