MYSQL DATABASE INTERVIEW QUESTIONS

What is the purpose of the GROUP BY clause in MySQL?

How would you explain the difference between GROUP BY and ORDER BY?

Can you give an example of a basic GROUP BY usage?

How does GROUP BY work with aggregate functions like SUM and AVG?

What is the purpose of the HAVING clause in relation to GROUP BY?

Can you explain how GROUP BY handles NULL values?

What is the difference between GROUP BY and DISTINCT?

How can you use GROUP BY with multiple columns, and what is its effect?

What are some performance considerations when using GROUP BY in large datasets?

During a database certification exam, you are asked to explain a scenario where using GROUP BY would be essential. What would you describe?