Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Do you have any ideas on when it would be beneficial to use default values and when it would be detrimental to data integrity?
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- What distinctions exist between the two categories of integrity constraints?arrow_forwardWhat distinguishes the two kinds of integrity constraints?arrow_forwardSuppose your database's referential integrity were compromised; what would happen then? Which kind of mistakes do you notice most often?arrow_forward
- How many records does the file contain? How many fields are there per record? What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure? If you wanted to produce a listing of the file contents by last name, area code, city, state, or zip code, how would you alter the file structure? What data redundancies do you detect? How could those redundancies lead to different types of anomalies?arrow_forwardCan you imagine scenarios where default values improve data integrity and situations where they impair it?arrow_forward
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