MSSQL DATABASE INTERVIEW QUESTIONS

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

How do you group data by a single column using the GROUP BY clause in MSSQL?

What is the difference between GROUP BY and ORDER BY in MSSQL?

How do you use the GROUP BY clause with multiple columns in MSSQL?

Can you use aggregate functions without the GROUP BY clause in MSSQL? Provide an example.

How do you filter groups using the HAVING clause in MSSQL?

How do you use the GROUP BY clause with complex expressions in MSSQL?

How do you optimize queries that use the GROUP BY clause in MSSQL?

How do you handle NULL values when using the GROUP BY clause in MSSQL?

Explain a scenario where using the GROUP BY clause in MSSQL is crucial for a business application and describe how you would implement it.