Calculate conversion rate per user from orders
Last updated: August 17, 2025
Quick Overview
Write SQL to compute conversion rate grouped by user from orders, handling nulls and duplicates.
Walmart
Data Manipulation (SQL/Python)
Data Scientist
Walmart
August 17, 2025Data Scientist
Onsite
Data Manipulation (SQL/Python)
Medium
689
15
3,090 solved
Write SQL to compute conversion rate grouped by user from orders, handling nulls and duplicates.
How to Approach This
- Clarify the schema and expected output format before writing queries.
- Use CTEs (WITH clauses) to break complex queries into readable steps.
- Consider window functions (ROW_NUMBER, RANK, LAG, LEAD) for ranking and sequential analysis.
- Watch for NULLs, duplicates, and edge cases in JOINs and GROUP BY.
- For pandas, prefer vectorized operations over row-by-row iteration.
Sharpen Your Skills on Codemia
Practice similar problems with our interactive workspace, get AI feedback, and track your progress.
Practice SQL ProblemsSubmit Your Answer
Markdown supported