POSTGRESQL DATABASE INTERVIEW QUESTIONS

What is the purpose of the HAVING clause in PostgreSQL?

How does the HAVING clause differ from the WHERE clause in PostgreSQL?

Can you use the HAVING clause without a GROUP BY clause in PostgreSQL?

What kind of functions can you use within a HAVING clause in PostgreSQL?

Is it possible to use multiple conditions in a HAVING clause in PostgreSQL? If so, how?

Describe a scenario where using the HAVING clause is more appropriate than using the WHERE clause in PostgreSQL.

Can you use column aliases in a HAVING clause in PostgreSQL? Why or why not?

How does the order of the GROUP BY and HAVING clauses affect the execution of a query in PostgreSQL?

Can you use subqueries in a HAVING clause in PostgreSQL? Provide an example scenario.

In a PostgreSQL certification exam, how might you be asked to use the HAVING clause to filter data in combination with other SQL features?