Some rows of the STUGRADE table of a school are shown below: ​ STU_CODE CLS_CODE GRADE YEAR 291 111 3.1 2010 938 101B 2.3 2011 931 M101 3.3 2040 291 M101 3.4 2018 190 111 2.0 2021 931 321 3.9 2003   Suppose that STU_CODE is the student code (foreign key) and CLS_CODE is the class code (foreign key). Which of the following computes the average for each year of the student with code 931?     a. SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931 GROUP BY YEAR   b. SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931.   c. SELECT AVG(GRADE) FROM STUGRADE GROUP BY STU_CODE = 931   d. SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931 GROUP BY AVG(GRADE)

Np Ms Office 365/Excel 2016 I Ntermed
1st Edition
ISBN:9781337508841
Author:Carey
Publisher:Carey
Chapter3: Performing Calculations With Formulas And Functions
Section: Chapter Questions
Problem 3.3CP
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Some rows of the STUGRADE table of a school are shown below:

STU_CODE

CLS_CODE

GRADE

YEAR

291

111

3.1

2010

938

101B

2.3

2011

931

M101

3.3

2040

291

M101

3.4

2018

190

111

2.0

2021

931

321

3.9

2003

 

Suppose that STU_CODE is the student code (foreign key) and CLS_CODE is the class code (foreign key). Which of the following computes the average for each year of the student with code 931?

 

  a.

SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931 GROUP BY YEAR

  b.

SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931.

  c.

SELECT AVG(GRADE) FROM STUGRADE GROUP BY STU_CODE = 931

  d.

SELECT AVG(GRADE) FROM STUGRADE WHERE STU_CODE = 931 GROUP BY AVG(GRADE)

 

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