Multiple Choice
When using the relational model to represent two tables, one must ________.
A) add a foreign key to one of the tables
B) have more than two primary keys in the model
C) establish only N:M relationships between the tables
D) use metadata instead of foreign keys
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q53: The lost-update problem can be resolved by
Q59: To modify an existing table, a developer
Q73: Define primary key, foreign key, and metadata.
Q79: NoSQL databases refer to nonrelational databases that
Q80: The format of metadata depends on the
Q86: The purpose of a database is to
Q87: A user does not need user account
Q88: Columns that are keys to different tables
Q89: Which of the following is true of
Q96: The data integrity problem occurs only if