Practice Cross Join (5.5.6) - Structured Query Language (SQL) - Part 2
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CROSS JOIN

Practice - CROSS JOIN

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does a CROSS JOIN do?

💡 Hint: Think about how many combinations would result if two sets are fully paired together.

Question 2 Easy

If you have 2 tables with 5 and 3 rows respectively, how many rows will a CROSS JOIN produce?

💡 Hint: Multiply the number of rows in both tables.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the main purpose of a CROSS JOIN?

To match rows with a condition
To create a Cartesian product
To filter rows

💡 Hint: Remember, it’s about combinations, not conditions.

Question 2

True or False: A CROSS JOIN will return an empty result set if one of the tables has rows.

True
False

💡 Hint: Think about the implications of combining tables with no data.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

You have two tables: 'Shirts (ID, Color)' with 3 rows and 'Pants (ID, Style)' with 4 rows. Write a CROSS JOIN and calculate the total number of results.

💡 Hint: Remember the number of rows multiplied together.

Challenge 2 Hard

Provide a scenario where using CROSS JOIN would be a mistake, and explain why.

💡 Hint: Think about when specific relationships between row data are needed.

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Reference links

Supplementary resources to enhance your learning experience.