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 167 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!

scikid

  • Member
  • Posts: 300
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Differences in reproductive strategies. Differences in reproductive strategies.
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
The birth weight of human infants is tightly constrained by natural selection. The birth weight of human infants is tightly constrained by natural selection.
Age Differences in Attention to a Puppet Show Video Age Differences in Attention to a Puppet Show Video
A typical heated zirconia oxygen sensor, showing the sensor signal circuit that uses the outer ... A typical heated zirconia oxygen sensor, showing the sensor signal circuit that uses the outer ...
Neurons in the outer layers of the brain Neurons in the outer layers of the brain
Video: Bone Healing Animation

For a complete list of videos, visit our video library