POSTGRESQL DATABASE INTERVIEW QUESTIONS

What is a LEFT JOIN in PostgreSQL?

When would you use a LEFT JOIN instead of an INNER JOIN in PostgreSQL?

Can you explain how NULL values are handled in a PostgreSQL LEFT JOIN?

How does a LEFT JOIN in PostgreSQL differ from a RIGHT JOIN?

What are some common use cases for using LEFT JOIN in PostgreSQL?

How would you handle performance issues when using LEFT JOIN in large PostgreSQL databases?

What are some potential pitfalls of using LEFT JOIN in PostgreSQL, and how can you avoid them?

How can you combine LEFT JOIN with other types of joins in a complex PostgreSQL query?

Explain how you would write a query using LEFT JOIN to find unmatched records between two tables in PostgreSQL.

Describe a scenario where a LEFT JOIN in PostgreSQL could be used to improve data integrity and provide an example.