Practice - Summary Table
Practice Questions
Test your understanding with targeted questions
What SQL command would you use to select all columns from the 'products' table?
💡 Hint: Remember, `*` means all columns.
How would you filter orders that are pending?
💡 Hint: Think about adding a WHERE clause.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What SQL command retrieves data from a table?
💡 Hint: Think about the purpose of the command.
True or False: The WHERE clause is used to filter results.
💡 Hint: Recall what WHERE does in a query.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
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.
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.
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Reference links
Supplementary resources to enhance your learning experience.