Interview Guides
In a data analyst interview, you are often asked not just whether you can write SQL, but whether you can explain why a query was structured a certain way and how it solved a real business problem. Interviewers want to hear both technical reasoning and business impact.
Describe a complex SQL query you wrote to solve a specific business problem in a commercial analytics setting such as Veeva CRM or Veeva Vault reporting. Your explanation should cover the business question, the tables you joined, why you used a CTE, how aggregations and CASE WHEN logic helped shape the result, and how you validated that the output was correct. You should also explain any trade-offs you made around readability, performance, or edge-case handling.
Keep your answer at a medium level of complexity: use a realistic example with 2-3 tables, at least one join, and either a CTE or subquery. The interviewer is looking for a clear walkthrough of the query structure, not just a list of SQL features.
