You know that databases, applications, and integrity services are necessary for systems to work. What integrity service guarantees that the tuples are uniquely identified by primary key values?
A)Rollback Integrity
B)Semantic Integrity
C)Entity Integrity
D)Referential Integrity

Question

Quizplus · Accepted Answer

Entity integrity service guarantees that tuples are uniquely identified by primary key values. Every tuple must contain one primary key. If not, it cannot be referenced by the database. The database must not contain unmatched foreign key values. Every foreign key refers to an existing primary key. If these values do not match, then their relationship is broken and again the database cannot reference the information properly.

You Know That Databases, Applications, and Integrity Services Are Necessary