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In data management, the concept of a key refers to a specific attribute or a combination of attributes that is used to identify, access, and manage data records efficiently within a database or information system. Keys play a fundamental role in organizing data, maintaining accuracy, and ensuring consistency across tables. They help distinguish one record from another and support effective storage, retrieval, and manipulation of data. A key is primarily used to uniquely identify a record in a table. For example, in a database table containing student ____ ______ ___ ___ ____ _________ ___ ___ _________ _____.
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