Database Concepts (7th Edition)
Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
Expert Solution & Answer
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Chapter 1, Problem 1.7RQ

Explanation of Solution

ID Column:

  • ID Column is a field which is used in databases having two or more themes and is divided according to the respective themes.
  • It is to provide uniqueness and avoid duplicity in the database and is quite similar to primary key but it differs from primary key as it is managed by the server and has the property of auto-incrementing which cannot be modified.

Example:

Cust_pet table:

...
sno Cust_fname Cust_lname Cust_phone Pet_type Pet_name
1 Green Robin 230-245-2546 Husky Shushi
2 Jackson Charles 213-235-2356 Malamute Leo
3 Pearson Jeffery 145-213-7658 Lebrador Rocky
4 Jackson

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