This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is not true about subtype entities? A) Subtypes may be exclusive. B) The ... (Read 114 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 7, 2018
Which of the following is not true about subtype entities?
 
  A) Subtypes may be exclusive.
  B) The supertype and subtypes will have the same identifier.
  C) Subtypes are used to avoid a situation in which some attributes are required to be null.
  D) All subtypes of a supertype must have the same attributes.

Question 2

In a correlated subquery of a database that has tables TableOne and TableTwo, if table TableOne is used in the upper SELECT statement, then which table is used in the lower SELECT statement?
 
  A) TableOne
  B) TableTwo
  C) Both TableOne and TableTwo
  D) Either TableOne or TableTwo


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tanna.moeller

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

A


jho37

  • Member
  • Posts: 531
Reply 2 on: Jul 7, 2018
YES! Correct, THANKS for helping me on my review

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

True-color view of Mars seen through NASA's Hubble Space Telescope in 1999 True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
True Forget-Me-Not True Forget-Me-Not
True Friendship True Friendship
Which of the following statements is true of linkage? Which of the following statements is true of linkage?
True Dover Sole True Dover Sole
A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ... A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ...
Video: Haustral churning, Gastrocolic reflex and mass peristalsis & Defecation

For a complete list of videos, visit our video library