Practice - Aggregate Functions
Practice Questions
Test your understanding with targeted questions
What does the COUNT() function do?
💡 Hint: Think about the context of counting items or entries.
Explain what the SUM() function accomplishes.
💡 Hint: Consider financial contexts, like adding up total expenses.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of the COUNT() function in SQL?
💡 Hint: Think about how many entries you need to tally.
True or False: The SUM() function can be used on non-numeric columns.
💡 Hint: What kind of data does SUM() need to perform its task?
1 more question available
Challenge Problems
Push your limits with advanced challenges
Write an SQL statement that finds the total number of products sold, the average price of sold products, the minimum price, and the maximum price from a Products table.
💡 Hint: Apply aggregate functions to different aspects of product sales.
In a dataset with employee hours worked, how would you find how many employees logged hours, the total hours worked, and the average hours worked?
💡 Hint: Utilize both COUNT and SUM with AVG for insights into work metrics.
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Reference links
Supplementary resources to enhance your learning experience.