Practice - LEFT JOIN (or LEFT OUTER JOIN)
Practice Questions
Test your understanding with targeted questions
What is the primary purpose of a LEFT JOIN?
💡 Hint: Think about what happens to unmatched rows.
In a LEFT JOIN, what is shown when there is no match on the right side?
💡 Hint: Consider the case when one table has extra data.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does a LEFT JOIN do?
💡 Hint: Think about what happens when some records in the left table don't find a match.
True or False: LEFT JOIN will display NULL values for unmatched records from the left table.
💡 Hint: Consider which direction the data is retained.
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Challenge Problems
Push your limits with advanced challenges
Create an SQL query that showcases all employees and their respective departments, ensuring that any employees without departments still appear in the results.
💡 Hint: Remember to join on Employee Department IDs.
Given a Products table and a Suppliers table, write a LEFT JOIN query that displays all products, showing supplier names where available.
💡 Hint: Ensure you're joining on the IDs that link products with their suppliers.
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Reference links
Supplementary resources to enhance your learning experience.