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 73 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
YES! Correct, THANKS for helping me on my review

Alyson.hiatt@yahoo.com

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

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

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Tag identify that the power has been removed and service work is being done. Tag identify that the power has been removed and service work is being done.
The camshaft is rotated in relation to the camshaft by the PCM to provide changes in valve timing. The camshaft is rotated in relation to the camshaft by the PCM to provide changes in valve timing.
The human hypothalamus (in color) in relation to the optic chiasm and the pituitary gland. The human hypothalamus (in color) in relation to the optic chiasm and the pituitary gland.
The relation between the physical and perceptual dimensions of sound. The relation between the physical and perceptual dimensions of sound.
The course of EEG stages during a typical night’s sleep and the relation of emergent stage 1 EEG ... The course of EEG stages during a typical night’s sleep and the relation of emergent stage 1 EEG ...
Chromatography columns packed with various chromatography resins Chromatography columns packed with various chromatography resins
Video: New DNA Strand Replication

For a complete list of videos, visit our video library