« previous next »

Author Question: A joining operation in which only the joining attribute from one site is transmitted to the other ... (Read 109 times)

kamilo84

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 7, 2018
A joining operation in which only the joining attribute from one site is transmitted to the other site is called a(n):
 
  A) attribute linkup.
  B) key data element transfer.
  C) key data element join.
  D) semijoin.

Question 2

Discuss when one would use total specialization and when one would use partial specialization.
 
  What will be an ideal response?
Modern Database Management ¦ Hoffer, Venkataraman, Topi ¦ 13th Edition
Buy Test-Bank


Amiracle

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

Total specialization would be used when you know that there are no other subtypes of a supertype other than those defined. For example, if we only had undergraduate and graduate students but no other types of students, then we would use total specialization. However, if there were students other than graduate and undergraduate, such as just a general student, then we would want to use partial specialization.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

The site of Dmanisi has produced some of the earliest H. erectus outside of Africa. The site of Dmanisi has produced some of the earliest H. erectus outside of Africa.
Acheulean handaxes litter the site of Olorgesailie Kenya. Acheulean handaxes litter the site of Olorgesailie Kenya.
Sample of an informed consent to perform an operation, sedation, anesthesia, and other medical servi Sample of an informed consent to perform an operation, sedation, anesthesia, and other medical servi
Mel Chin, Operation Paydirt/Fundred Dollar Bill Project. Mel Chin, Operation Paydirt/Fundred Dollar Bill Project.
The pressure cap should be checked for proper operation using a pressure tester as part of the ... The pressure cap should be checked for proper operation using a pressure tester as part of the ...
In Falls, Energy Is Transmitted Along the Skeletal System In Falls, Energy Is Transmitted Along the Skeletal System
Video: Hershey Chase Experiments

For a complete list of videos, visit our video library