Author Question: A composite identifier is defined as a composite attribute that is an identifier. Indicate ... (Read 146 times)

segrsyd

  • Hero Member
  • *****
  • Posts: 530
A composite identifier is defined as a composite attribute that is an identifier.
 
  Indicate whether the statement is true or false

Question 2

A surrogate key is an artificial column that is added to a relation to be its primary key.
 
  Indicate whether the statement is true or false



fwbard

  • Sr. Member
  • ****
  • Posts: 325
Answer to Question 1

FALSE

Answer to Question 2

TRUE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

fwbard

  • Sr. Member
  • ****
  • Posts: 325

 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

For a complete list of videos, visit our video library