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

Author Question: A(n) ________ is one or more columns of a relation that is used to identify a row. Fill in the ... (Read 21 times)

saliriagwu

  • Hero Member
  • *****
  • Posts: 537
on: Jul 7, 2018
A(n) ________ is one or more columns of a relation that is used to identify a row.
 
  Fill in the blank(s) with correct word

Question 2

Which of the following is true about a shared lock?
 
  A) It is more restrictive than an implicit lock.
  B) It allows only two transactions to update a record simultaneously.
  C) It locks the item from all access.
  D) It allows reads to the locked item.
  E) It must use a two-phase locking scheme.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

parshano

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 7, 2018
Answer to Question 1

key

Answer to Question 2

D


saliriagwu

  • Member
  • Posts: 537
Reply 2 on: Jul 7, 2018
Wow, this really help

ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry. Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry.
Position of lung lobes in relation to anatomical landmarks Position of lung lobes in relation to anatomical landmarks
Table 6.1 illustrates the main regime types and their differences. It breaks the regimes into four Table 6.1 illustrates the main regime types and their differences. It breaks the regimes into four
An example of a selection list used to identify symptoms. An example of a selection list used to identify symptoms.
Always use the viscosity of oil as specified on the oil fill cap. Always use the viscosity of oil as specified on the oil fill cap.
Testing client’s ability to identify dull sensation Testing client’s ability to identify dull sensation
Video: Monohybrid crosses

For a complete list of videos, visit our video library