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

Author Question: Which is the primary key(s) in the following STUDENT_GRADE(StudentID, CourseID, Grade)? A) ... (Read 38 times)

serike

  • Hero Member
  • *****
  • Posts: 542
on: Jul 7, 2018
Which is the primary key(s) in the following STUDENT_GRADE(StudentID, CourseID, Grade)?
 
  A) STUDENT_GRADE
  B) StudentID
  C) CourseID
  D) StudentID, CourseID
  E) Grade

Question 2

Which of the following is an example of a horizontal-market application software?
 
  A) a software developed by the IRS for its own needs
  B) ArtRage, the iPad application
  C) AutoCad
  D) Microsoft Excel

Question 3

CPU speed is expressed in cycles called ________.
 
  A) hertz
  B) bytes
  C) bits
  D) pixels


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

l.stuut

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 7, 2018
Answer to Question 1

D
Explanation: D) The relation STUDENT_GRADE has a composite primary key.
CL

Answer to Question 2

Posted another one can you check that one too? Thanks.

Answer to Question 3

A


serike

  • Member
  • Posts: 542
Reply 2 on: Jul 7, 2018
:D TYSM

shailee

  • Member
  • Posts: 392
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Primary Recovery of Oil Primary Recovery of Oil
Forms of primary adult glaucoma Forms of primary adult glaucoma
Comparing the structure of a primary shoot from (A) a monocot and (b) a eudicot. Comparing the structure of a primary shoot from (A) a monocot and (b) a eudicot.
Human development grade 1 Human development grade 1
Grade 1 math Grade 1 math
Grade 1 math Grade 1 math
Video: The primary factors that affect circulation - MABP, CO and SVR

For a complete list of videos, visit our video library