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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What SQL function counts the number of records?
💡 Hint: Think about how we can summarize data.
Question 2
Easy
What does the FROM clause specify in a query?
💡 Hint: It describes the source of data.
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 SQL function is used to count records?
- SUM
- COUNT
- AVG
💡 Hint: It's for counting entries.
Question 2
True or False: The HAVING clause works with raw data.
- True
- False
💡 Hint: Think about what GROUP BY does.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You are analyzing user login data for an app. Write a SQL query that could help you understand how many users logged in each month in 2024.
💡 Hint: Consider how to extract months and aggregate counts.
Question 2
A company's marketing department wants to check which products had zero sales last month. Compose a SQL query that could help them find this information.
💡 Hint: Use LEFT JOIN to include all products, checking for those with no sales.
Challenge and get performance evaluation