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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Write an SQL query to count the number of products sold in each category.
💡 Hint: Remember to use GROUP BY after the SELECT statement.
Question 2
Easy
How would you find the total number of orders made by each customer?
💡 Hint: You'll need to aggregate by customer ID.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What clause do you use to group results based on a specific column?
- HAVING
- GROUP BY
- ORDER BY
💡 Hint: Think about how you would summarize data.
Question 2
True or False: The HAVING clause can be used without GROUP BY.
- True
- False
💡 Hint: Remember what HAVING is designed for.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Draft a SQL query that identifies the three products with the highest sales, excluding any product that sold less than 50 units.
💡 Hint: Use GROUP BY and HAVING effectively to filter.
Question 2
Create a comprehensive report using SQL that highlights customer segments based on their number of purchases, categorizing them as 'Low', 'Medium', or 'High' based on thresholds you define.
💡 Hint: You’ll need to use a CASE statement along with GROUP BY and HAVING.
Challenge and get performance evaluation