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
Correct Answer:
Verified
Q196: Which of the following is incorrect in
Q235: What is the logical view of information?
A)deals
Q236: Which of the following systems allow users
Q237: What is a foreign key?
A)a field (or
Q238: Your textbook discussed a record store example
Q239: A database maintains information on _.
A)inventory
B)transactions
C)employees
D)All of
Q242: Which of the following is a disadvantage
Q243: Which of the following will enforce business
Q244: Which of the statements below means the
Q245: What is information redundancy?
A)duplication of data
B)storing the
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