SQL Quiz: Can You Master SELECT, JOIN & GROUP BY?

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Thames
T
Thames
Community Contributor
Quizzes Created: 7097 | Total Attempts: 80,150
| Questions: 20 | Updated: Jul 2, 2026
Quiz
Please wait...
Question 1 / 21
🏆 Rank #--
0 %
0/100
Score 0/100

1. What is the correct syntax for a basic SELECT statement?

Submit
Please wait...
About This Quiz
SQL Quiz: Can You Master Select, Join & Group By? - Quiz

Test your SQL Fundamentals (Data+) knowledge with this college-level quiz covering SELECT, JOIN, and GROUP BY operations. Master essential data retrieval, table relationships, and aggregation techniques used in real-world database queries. Perfect for students preparing for CompTIA Data+ certification or strengthening core SQL skills.

2.

What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. In a JOIN, the ON clause specifies ____.

Submit

3. What does SUM() aggregate function calculate?

Submit

4. Which keyword combines results from multiple SELECT statements?

Submit

5. What is the purpose of the LIMIT clause?

Submit

6. A FULL OUTER JOIN returns rows that match in which scenario?

Submit

7. In a GROUP BY query, which columns must be in the SELECT list?

Submit

8. What does ORDER BY do in a SELECT statement?

Submit

9. Which aggregate function returns the average of numeric values?

Submit

10. A RIGHT JOIN returns all rows from which table?

Submit

11. Which SQL clause is used to filter rows before aggregation in a GROUP BY query?

Submit

12. In SQL, which aggregate function returns the highest value in a column?

Submit

13. What does the UNION operator do?

Submit

14. Which clause must follow GROUP BY when filtering aggregated data?

Submit

15. What does a CROSS JOIN produce?

Submit

16. Which function counts non-NULL values in a column?

Submit

17. What is the primary purpose of the GROUP BY clause?

Submit

18. Which JOIN type returns all rows from the left table and matching rows from the right?

Submit

19. In a SELECT statement, which keyword removes duplicate rows from results?

Submit

20. What does an INNER JOIN return?

Submit
×
Saved
Thank you for your feedback!
View My Results
Cancel
  • All
    All (20)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
What is the correct syntax for a basic SELECT statement?
In a JOIN, the ON clause specifies ____.
What does SUM() aggregate function calculate?
Which keyword combines results from multiple SELECT statements?
What is the purpose of the LIMIT clause?
A FULL OUTER JOIN returns rows that match in which scenario?
In a GROUP BY query, which columns must be in the SELECT list?
What does ORDER BY do in a SELECT statement?
Which aggregate function returns the average of numeric values?
A RIGHT JOIN returns all rows from which table?
Which SQL clause is used to filter rows before aggregation in a GROUP...
In SQL, which aggregate function returns the highest value in a...
What does the UNION operator do?
Which clause must follow GROUP BY when filtering aggregated data?
What does a CROSS JOIN produce?
Which function counts non-NULL values in a column?
What is the primary purpose of the GROUP BY clause?
Which JOIN type returns all rows from the left table and matching rows...
In a SELECT statement, which keyword removes duplicate rows from...
What does an INNER JOIN return?
play-Mute sad happy unanswered_answer up-hover down-hover success oval cancel Check box square blue
Alert!