Multiple Choice
The database constraint that says that foreign keys must be null or have a value corresponding to the value of a primary key in another table is formally called the
A) entity integrity rule.
B) referential integrity rule.
C) rule of keys.
D) referential entity rule.
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q24: Which is probably the most significant effect
Q25: The DBMS language that is used for
Q26: The abstract representation of the contents of
Q27: There are two basic ways to design
Q28: What is one potential drawback in the
Q30: A set of individual user views of
Q32: List the four languages used within a
Q33: All of the following are benefits of
Q34: The _ contains information about the structure
Q83: The data dictionary usually is maintained<br>A)automatically by