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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Write a SELECT statement to get the names of all employees.
💡 Hint: Think about which columns you need from the employees table.
Question 2
Easy
Use a WHERE clause to find orders with a status of 'Completed'.
💡 Hint: Use the STATUS you see in the orders table.
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 does the SELECT statement do?
- It deletes records from a table.
- It retrieves data from one or more tables.
- It modifies data in a table.
💡 Hint: Think about what SELECT allows you to do with data.
Question 2
True or False: The LIMIT clause can be used to specify the maximum number of records returned.
- True
- False
💡 Hint: Recall the purpose of LIMIT.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a complex query using JOIN, COUNT, and GROUP BY to identify the total number of orders each customer has made and sort them in descending order.
💡 Hint: Start by figuring out how customers relate to orders.
Question 2
Consider a dataset with users and their activity logs. Write a query to find which users have more than 10 logins in the last month.
💡 Hint: You’ll need to filter by date and aggregate logins.
Challenge and get performance evaluation