Practice Inner Join (or Just Join) (5.5.1) - Structured Query Language (SQL) - Part 2
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INNER JOIN (or just JOIN)

Practice - INNER JOIN (or just JOIN)

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does an INNER JOIN do?

💡 Hint: Think about how two groups of related data can be connected.

Question 2 Easy

In an INNER JOIN, what happens to rows without matches?

💡 Hint: Remember the exclusive nature of this join.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the purpose of INNER JOIN in SQL?

To combine rows from tables based on matching values
To remove duplicates from a dataset
To order the results

💡 Hint: Think about how data from different sources can be integrated.

Question 2

True or False: INNER JOIN will include unmatched rows in the final results.

True
False

💡 Hint: What does 'INNER' imply about the inclusion criteria?

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Using INNER JOIN, write a SQL statement to retrieve all orders and the customers who made those orders from the 'Orders' table and the 'Customers' table, respectively.

💡 Hint: Identify the common key between the two tables.

Challenge 2 Hard

If a new department is added to the 'Departments' table, how would you modify an INNER JOIN to reflect this change without including unmatched data?

💡 Hint: Consider the dynamic nature of INNER JOIN in relation to database changes.

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Reference links

Supplementary resources to enhance your learning experience.