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wrote...
Posts: 197
5 months ago
Briefly describe the various tasks of the primary key.
Textbook 
Database Processing: Fundamentals, Design, and Implementation
Edition: 15th
Authors:
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5 months ago
The primary key is used for four primary tasks. First, it is used to uniquely identify the rows in a table. Second, it is used to represent rows in relationships. Third, most DBMS products use the values of the primary key to organize the storage of the relation. Finally, primary keys are used in indexes and other structures to improve performance for search operations.
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