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

Author Question: Explain the term time-variant in the following data warehouse definition:The data warehouse is a ... (Read 84 times)

kwoodring

  • Hero Member
  • *****
  • Posts: 560
on: Jul 7, 2018
Explain the term time-variant in the following data warehouse definition:The data warehouse is a structured repository of integrated, subject-oriented, enterprise-wide, historical, and time-variant data.
 
  The purpose of the data warehouse is the retrieval of analytical information. A data warehouse can store detailed and/or summarized data.

Question 2

Table ENROLLMENT is:
 
  A) Not in 1NF
  B) In 1NF but not in 2NF
  C) In 2NF but not in 3NF
  D) In 3NF


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nmyers

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 7, 2018
Answer to Question 1

The term time-variant refers to the fact that a data warehouse contains slices or snapshots of data from different periods of time across its time horizon. With these data slices, the user can create reports for various periods of time within the time horizon. For example, if the subject of analysis is cost and the time horizon is a number of years, we can analyze and compare the cost for the first quarter from a year ago versus the cost for the first quarter from two years ago.

Answer to Question 2

C


kwoodring

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Jul 7, 2018
Thank you :)


nmyers

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 7, 2018
Happy to help you


« previous next »
 

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Adults in late middle adulthood frequently look forward to spending more time with their partner Adults in late middle adulthood frequently look forward to spending more time with their partner
Applying a time strip to the IV container. Applying a time strip to the IV container.
Time Slows Down Near Matter Time Slows Down Near Matter
A physician uses a portable electronic tablet to enter patient data while in the examination room. A physician uses a portable electronic tablet to enter patient data while in the examination room.
Radiation Side Effects, Healing Time, and Intervention Radiation Side Effects, Healing Time, and Intervention
In early capitalism, children worked alongside adults. At that time, just as today, most street ... In early capitalism, children worked alongside adults. At that time, just as today, most street ...
Video: Magnetic resonance imaging (MRI)

For a complete list of videos, visit our video library