Question

Which of the following is NOT true regarding keys?

1) Each table should have a primary key to uniquely identify each of the records in the table.
2) A foreign key is a value in a table that is the primary key of another table.
3) The primary and foreign keys form the common field between tables that allow you to form a relationship between the two tables.
4) To define a foreign key, select the foreign key field and then click the Key button on the Ribbon.

Answer 1

The statement that is NOT true regarding keys is the fourth one, as defining a foreign key depends on the specific database management system and does not necessarily involve a 'Key' button on any Ribbon interface.

Step-by-step explanation:

The question refers to the concept of keys in database management, particularly in the context of relational databases. The student is asked to identify which statement about keys is NOT true:

1. Each table should have a primary key to uniquely identify each of the records in the table.
2. A foreign key is a value in a table that is the primary key of another table.
3. The primary and foreign keys form the common field between tables that allow you to form a relationship between the two tables.
4. To define a foreign key, select the foreign key field and then click the Key button on the Ribbon.

Now, looking at these options:

• The first statement is true as a primary key serves the purpose of uniquely identifying each row in a table.
• The second statement is accurate as a foreign key corresponds to the primary key in a related table, which is how relationships between tables are established.
• The third statement is also correct since the relationship between tables in a database is typically established using primary and foreign keys.
• The fourth statement, however, is NOT necessarily true. The process described seems specific to a particular software's user interface, which may not apply universally to all database management systems. To define a foreign key, the specific steps can vary based on the software or method being used.

Hence, the correct answer to the question is statement 4, as the method to define a foreign key depends on the database management system and does not universally involve clicking a Key button on the Ribbon.