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

Author Question: Which of the following is not true about subtype entities? A) Subtypes may be exclusive. B) The ... (Read 83 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 7, 2018
Which of the following is not true about subtype entities?
 
  A) Subtypes may be exclusive.
  B) The supertype and subtypes will have the same identifier.
  C) Subtypes are used to avoid a situation in which some attributes are required to be null.
  D) All subtypes of a supertype must have the same attributes.

Question 2

In a correlated subquery of a database that has tables TableOne and TableTwo, if table TableOne is used in the upper SELECT statement, then which table is used in the lower SELECT statement?
 
  A) TableOne
  B) TableTwo
  C) Both TableOne and TableTwo
  D) Either TableOne or TableTwo


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tanna.moeller

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

A


jho37

  • Member
  • Posts: 531
Reply 2 on: Jul 7, 2018
Thanks for the timely response, appreciate it

patma1981

  • Member
  • Posts: 292
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

True-color view of Mars seen through NASA's Hubble Space Telescope in 1999 True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
Adapoids and omomyoids had longer snouts and are the first “true” primates. Adapoids and omomyoids had longer snouts and are the first “true” primates.
Flowchart to determine if a species is autotroph, heterotroph, or a subtype Flowchart to determine if a species is autotroph, heterotroph, or a subtype
True Dover Sole True Dover Sole
Midsagittal section indicating locations of true and false pelves Midsagittal section indicating locations of true and false pelves
Anterosuperior view of true pelvis (blue) Anterosuperior view of true pelvis (blue)
Video: Buffers definition and the role of buffer in the body

For a complete list of videos, visit our video library