Suppose a relational database contained two linked tables.Which of the following items is not necessarily present in the database?
A)Two primary keys
B)Two foreign keys
C)At least one column
D)One foreign key

Question

Quizplus · Accepted Answer

In a relational database with two linked tables, each table typically has its own primary key (A), and there must be at least one column in each table (C). A foreign key is required in one of the tables to establish the relationship between the two tables (D), but having two foreign keys (B) is not a necessity unless the relationship is bidirectional and both tables need to reference each other directly.

Suppose a Relational Database Contained Two Linked Tables