POSTGRESQL DATABASE INTERVIEW QUESTIONS

What is SQL?

Why is SQL important for database management?

What are the basic components of an SQL statement?

Can you explain the difference between DDL and DML in SQL?

What is a primary key in SQL?

What are SQL constraints and why are they used?

How does the normalization process improve database design?

What is a SQL JOIN and what are its types?

What are subqueries in SQL and when would you use them?

What is the difference between UNION and UNION ALL in SQL?