POSTGRESQL DATABASE INTERVIEW QUESTIONS

What is a subquery in PostgreSQL?

Can you explain the difference between a correlated and a non-correlated subquery in PostgreSQL?

How can you use a subquery in the SELECT clause in PostgreSQL?

What are the limitations of using subqueries in PostgreSQL?

How does PostgreSQL handle subqueries in the WHERE clause?

Describe how you can use a subquery in the FROM clause in PostgreSQL.

Explain how to use a subquery with the EXISTS operator in PostgreSQL.

How can you use a subquery with the ANY or ALL operators in PostgreSQL?

What are the performance considerations when using subqueries in PostgreSQL?

Describe a scenario where using a subquery in PostgreSQL would be more beneficial than using a join.