Differentiate between left join, union and right join.

Medium Difficulty

Medium questions delve deeper, challenging you to apply your knowledge to common scenarios. They test your ability to think on your feet and adapt your basic skills to real-world contexts.

SQL question

SQL questions test your ability to work with relational databases. Demonstrate your proficiency in writing queries, understanding database design, optimizing performance, and extracting meaningful information from structured data.

Here's a Hint

Use visual examples to explain how each join affects result sets, and clarify that UNION is fundamentally different as it combines rows rather than columns.