In a database, what signifies a unique identifier for a record?

Prepare for the Teradata Associate Exam with interactive flashcards and extensive multiple-choice questions. Each question is equipped with hints and detailed explanations. Ace your Teradata test!

A primary key is the correct choice because it is specifically designed to serve as a unique identifier for records within a database table. Each record in the database can be uniquely identified by its primary key, ensuring that no two records can have the same primary key value. This uniqueness is essential for maintaining data integrity and facilitating efficient database operations, such as querying and referencing related data.

In contrast, a table refers to a collection of records and fields, not an identifier. A field is a column within a table that holds data of a particular type, but by itself, it does not guarantee uniqueness. A record represents a single entry in the table, a collection of related fields, but again does not ensure uniqueness without a primary key. Therefore, the primary key stands out as the essential element that specifically designates and enforces uniqueness for each record in the database.

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