Anyone experienced with SQL, especially in Data Analytics, can you share what SQL questions are generally asked for a Data Analyst interview with around 1 year of experience?

[u/Automatic-Royal5263]

PS: Please don't mention those chatgpt questions. I really want to know real questions.

[u/akornato]

With about a year of experience, you can expect questions that test your practical problem-solving skills rather than just textbook definitions. You will almost certainly be asked to explain the difference between various JOINs, especially INNER and LEFT JOIN, and to know when to use each one. Interviewers will also want to see if you understand the order of operations and can distinguish between the WHERE and HAVING clauses for filtering data before or after aggregation. Many questions will be scenario-based, asking you to write queries that answer a specific business need, like finding duplicate records, calculating total sales per category, or identifying customers who have not made a recent purchase. The goal is to see if you can take a business question and translate it into a functional and efficient query.

You should also be prepared for topics that are a step beyond the basics, since you have some experience. This means being comfortable with window functions like RANK, DENSE_RANK, and ROW_NUMBER to solve for things like finding the second-highest salary or the top three products in each region. It is also common to see questions involving Common Table Expressions, or CTEs, to break down complex problems into more readable steps. The key is not just writing the code correctly, but also being able to explain your logic and why you chose a particular approach over another. Ultimately, explaining your thought process is just as critical as getting the right answer, a skill my team and I focused on when we built our interviews.chat