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 29 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
Great answer, keep it coming :)

xthemafja

  • Member
  • Posts: 348
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Unique markings identify individual humpback whales. Unique markings identify individual humpback whales.
Identify the structures shown below by filling in the blanks. Identify the structures shown below by filling in the blanks.
The relation between the physical and perceptual dimensions of sound. The relation between the physical and perceptual dimensions of sound.
How to find the maximum and minimum of a quadratic relation How to find the maximum and minimum of a quadratic relation
Identify the variable representing each described quantity in the equation Identify the variable representing each described quantity in the equation
X-ray showing pneumonia. Fluid and blood cells fill the lungs X-ray showing pneumonia. Fluid and blood cells fill the lungs
Video: ATPase function - membrane transport, contractile proteins and synthesis

For a complete list of videos, visit our video library