Which question would you ask during a job interview to test if the interviewed master SQL ?
To test an interviewee's mastery of SQL, you could ask questions such as:

- What is a SQL join and how does it work?
- Can you explain the difference between a left join and a right join?
- How do you optimize a SQL query for performance?
- Can you explain the concept of normalization in database design?
- What is a subquery in SQL and when would you use one?
- Can you explain the difference between the WHERE and HAVING clauses in SQL?
- Have you ever used a recursive SQL query? If so, can you give an example and explain how it works?
- Can you explain the difference between UNION and UNION ALL in SQL?
- How do you handle NULL values in a SQL query?
- Have you worked with any SQL optimization tools, such as indexes or query plans? Can you give an example of how you used them to - improve performance?
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:

Which question would you ask during a job interview to test if the interviewed master SQL ?

### Response:

To test an interviewee's mastery of SQL, you could ask questions such as:

- What is a SQL join and how does it work?
- Can you explain the difference between a left join and a right join?
- How do you optimize a SQL query for performance?
- Can you explain the concept of normalization in database design?
- What is a subquery in SQL and when would you use one?
- Can you explain the difference between the WHERE and HAVING clauses in SQL?
- Have you ever used a recursive SQL query? If so, can you give an example and explain how it works?
- Can you explain the difference between UNION and UNION ALL in SQL?
- How do you handle NULL values in a SQL query?
- Have you worked with any SQL optimization tools, such as indexes or query plans? Can you give an example of how you used them to - improve performance?
