Preview of practice Inner Join (2.1) - SQL for Business Analysts - Business Analysis
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INNER JOIN

Practice - INNER JOIN

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does INNER JOIN do in SQL?

💡 Hint: Think about how it relates to two sets of data.

Question 2 Easy

Write a basic INNER JOIN query to retrieve names from two related tables.

💡 Hint: Follow the structure of SELECT, FROM, JOIN.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the purpose of INNER JOIN?

To merge tables
To retrieve records with matching values
To sort data

💡 Hint: Focus on what INNER JOIN filters out.

Question 2

True or False: INNER JOIN will return records even if there are no matches in both tables.

True
False

💡 Hint: Recall how INNER JOIN functions.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Write an INNER JOIN query that retrieves names and addresses of customers who have more than 3 orders.

💡 Hint: You need to group and filter based on the order count.

Challenge 2 Hard

Discuss how you would optimize an INNER JOIN query for large datasets.

💡 Hint: Think about database performance best practices.

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Reference links

Supplementary resources to enhance your learning experience.