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

Author Question: Discuss the differences between an equi-join, natural join and outer join. What will be an ideal ... (Read 182 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
on: Jul 7, 2018
Discuss the differences between an equi-join, natural join and outer join.
 
  What will be an ideal response?

Question 2

Restrictions on removable media should be enforced by relying on user behavior, rather than technological restrictions.
 
  Indicate whether the statement is true or false.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

spencer.martell

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 7, 2018
Answer to Question 1

Both a natural join and an equi-join create a join based upon equality between some common columns. While the equi-join keeps the redundant columns that are used for the match, the natural join removes duplicates. There are situations where one table may contain information that is not in the other table. However, it is necessary to display both matching data as well as records which do not have a match in the second table. This situation is where we would use an outer join.

Answer to Question 2

Answer: FALSE


Evvie72

  • Member
  • Posts: 519
Reply 2 on: Jul 7, 2018
Gracias!

tuate

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Blending inheritance formed the basis of nineteenth-century critiques of evolution by natural select Blending inheritance formed the basis of nineteenth-century critiques of evolution by natural select
Genetic differences between humans, Neadertals, and chimps. Genetic differences between humans, Neadertals, and chimps.
When a Tornado Strikes: Social Organization Following a Natural Disaster When a Tornado Strikes: Social Organization Following a Natural Disaster
Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ... Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ...
Natural selection acts on genetic variation Natural selection acts on genetic variation
Chemical bonds join atoms into molecules Chemical bonds join atoms into molecules
Video: Stroke volume - preload, sarcomere length and Frank -Starling law

For a complete list of videos, visit our video library