Which of the following describes two desirable characteristics of a primary key?�
A.A primary key should be a value that may be null and may change over time.�
B.A primary key should be a value that is not null and will never change.�
C.A primary key should consist of meaningful data and a value that can be changed if needed.�
D.A primary key should not consist of meaningful data and a value that can be changed if needed.�
Answer:B
Which of the following describes two desirable characteristics of a primary key?�
A.A primary key should be a value that may be null and may change over time.� B.A primary key should be a value that is not null and will never change.� C.A primary key should consist of meaningful data and a value that can be changed if needed.� D.A primary key should not consist of meaningful data and a value that can be changed if needed.�