Practice - Aggregations & Grouping
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Practice Questions
Test your understanding with targeted questions
What function would you use to count the total number of records?
💡 Hint: Remember, it gives you the headcount of records.
What does the SUM function calculate?
💡 Hint: Think about adding up numbers.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What function would you use to find the total number of sales transactions?
💡 Hint: It’s used for headcounts.
The HAVING clause is used to filter records before grouping.
💡 Hint: Associated with GROUP BY.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
How would you find out which products sold the most in the last month? Provide a SQL query example.
💡 Hint: Filter sales based on dates and group by product_id.
Draft a SQL query using a GROUP BY and HAVING clause to find out how many support tickets are open for each priority level, and show only those levels with more than 5 tickets.
💡 Hint: Ensure to count and set a threshold for open tickets.
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Reference links
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