This topic contains a solution. Click here to go to the answer

Author Question: Which of the following is not true about subtype entities? A) Subtypes may be exclusive. B) The ... (Read 113 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
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
Answer to Question 1

D

Answer to Question 2

A




jho37

  • Member
  • Posts: 531
Reply 2 on: Jul 7, 2018
:D TYSM


phuda

  • Member
  • Posts: 348
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

For a complete list of videos, visit our video library