POSTGRESQL DATABASE INTERVIEW QUESTIONS

What is PostgreSQL, and why is it used?

How do you connect to a PostgreSQL database?

What are some common data types used in PostgreSQL?

What is a schema in PostgreSQL, and why is it important?

Can you explain what an index is and how it improves performance in PostgreSQL?

What is the difference between VACUUM and ANALYZE commands in PostgreSQL?

What are table partitions in PostgreSQL, and how do they help in managing large datasets?

How does PostgreSQL handle concurrent transactions, and what isolation levels are available?

What are the advantages and disadvantages of using the JSONB data type in PostgreSQL?

Explain the concept of Foreign Data Wrappers (FDW) in PostgreSQL and their use cases.