Explain the concept of key in data management.
In data management, a key is a crucial element used to uniquely identify, retrieve, and manipulate records within a database or dataset. Keys are vital for ensuring data integrity, preventing duplication, and establishing relationships between different tables in a database.
Types of Keys in Practical Applications:
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Primary Key:
A primary key is a unique identifier for a record in a table. For instance, ______ ________ _____ ___ ______ ___ ______.
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