POSTGRESQL DATABASE INTERVIEW QUESTIONS

What does the '<>' or '!=' operator do in PostgreSQL?

Can you explain the difference between '=' and '<>' or '!=' operators in PostgreSQL?

Why might you use the '<>' or '!=' operator instead of the '=' operator in PostgreSQL?

How would you use the '<>' or '!=' operator in a WHERE clause to filter data in PostgreSQL?

Can the '<>' or '!=' operator be used with NULL values in PostgreSQL?

Describe a scenario where using '<>' or '!=' could help optimize a query in PostgreSQL.

How does the PostgreSQL optimizer handle queries with the '<>' or '!=' operator?

Can the '<>' or '!=' operator affect the performance of complex joins in PostgreSQL?

In what situations might the '<>' or '!=' operator lead to unexpected results when dealing with string data in PostgreSQL?

Explain how the use of the '<>' or '!=' operator in combination with the ORACLE compatibility mode in PostgreSQL can affect query results and performance.