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Author Question: Briefly describe the various tasks of the primary key. What will be an ideal ... (Read 51 times)

jazziefee

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on: Jul 7, 2018
Briefly describe the various tasks of the primary key.
 
  What will be an ideal response?

Question 2

Databases are created in a DBMS during the implementation step.
 
  Indicate whether the statement is true or false


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frankwu0507

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Reply #1 on: Jul 7, 2018
Answer to Question 1

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.

Answer to Question 2

TRUE


jazziefee

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Reply 2 on: Jul 7, 2018
Gracias!

aliotak

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Reply 3 on: Yesterday
Excellent

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