
Quiz on Aggregate Functions in SQL
Authored by Margaret Rivera
Computers
University
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a school database, Emma wants to know the average score of all students in the math exam. What do aggregate functions in SQL primarily do to help her?
Filter data based on specific conditions
Join multiple tables together
Perform calculations on multiple rows and return a single value
Sort data in ascending order
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a school, Abigail is calculating the total score of her classmates in a math competition. Which of the following functions would she use to find the total score?
JOIN()
WHERE()
SELECT()
SUM()
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Henry wants to find out how well he performed in his math class. He decides to use the AVG() function to calculate his grades. What does the AVG() function calculate?
The total of all values
The average of a set of values
The highest value in a column
The lowest value in a column
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a classroom, Arjun wants to know how many students attended the lecture. What is the purpose of the COUNT() function?
To find the maximum value in a column
To count the number of rows in a dataset
To calculate the average of a dataset
To sum all numeric values
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a school, a teacher wants to analyze the test scores of students. Which SQL clause should the teacher use to group the scores of students with the same values?
ORDER BY
HAVING
GROUP BY
SELECT
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a school, Rohan wants to find out how many students scored above average in their exams. He uses the HAVING clause to filter the results after calculating the average scores of all students.
Groups data into categories
Sorts data in descending order
Filters results after aggregation
Filters results before aggregation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sophia is working on a project where she needs to create a new table in her database to store customer information. What is the function of the SELECT INTO command?
To create a new table and insert data into it
To update existing records in a table
To retrieve data from multiple tables
To delete records from a table
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