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Computers and Technology, 19.02.2020 06:36, juan01sebastian00
Consider a relation about people in the United States, including their name, Social Security number, street address, city, state, ZIP code, area code, and phone number (7 digits). What FD’s would you expect to hold? What are the keys for the relation? To answer this question, you need to know something about the way these numbers are assigned. For instance, can an area code straddle two states? Can a ZIP code straddle two area codes? Can two people have the same Social Security number? Can they have the same address or phone number?
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Computers and Technology, 23.06.2019 00:00, destinysmithds7790
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Consider a relation about people in the United States, including their name, Social Security number,...
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