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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What SQL command would you use to select all columns from the 'products' table?
💡 Hint: Remember, `*` means all columns.
Question 2
Easy
How would you filter orders that are pending?
💡 Hint: Think about adding a WHERE clause.
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 command retrieves data from a table?
- UPDATE
- SELECT
- DELETE
💡 Hint: Think about the purpose of the command.
Question 2
True or False: The WHERE clause is used to filter results.
- True
- False
💡 Hint: Recall what WHERE does in a query.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a query that retrieves the total number of orders and groups them by customer ID, then filter so only customers with more than 2 orders are shown.
💡 Hint: Combine COUNT with GROUP BY and HAVING.
Question 2
Construct a SQL statement to find product IDs and their associated sales, including those with zero sales using appropriate joins.
💡 Hint: Use a LEFT JOIN to include all products.
Challenge and get performance evaluation