Final answer:
Foreign keys are used to establish relationships between tables in a database. The AutoNumber data type is typically used for primary key fields, not foreign keys. The purpose of a foreign key is to create a link between tables by referencing the primary key of another table. Foreign keys should be unique in the table.
Step-by-step explanation:
Foreign keys are an important concept in database management systems. They are used to establish relationships between tables in a database. Here is a breakdown of the statements in the question:
- The AutoNumber data type is typically used for foreign key fields. This statement is not true. The AutoNumber data type is typically used for primary key fields, not foreign keys. The primary key field in one table is often used as the foreign key in another table to establish a relationship.
- A foreign key is a field in a table that stores a value that is the primary key in another table. This statement is true. The purpose of a foreign key is to create a link between tables. It allows you to match records in different tables based on the primary key of one table and the foreign key of another table.
- It is called foreign because it identifies a record in another table. This statement is true. The foreign key identifies a record in another table by referencing its primary key. This is how relationships between tables are established.
- Foreign keys do not need to be unique in the table. This statement is not true. In most cases, foreign keys should be unique in the table to ensure the integrity of the relationships.
So, the correct answer is statement 1) The AutoNumber data type is typically used for foreign key fields is NOT true regarding foreign keys.