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Given a dataset, write a query to measure monthly retention.
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Data Analyst
Marketer
General
Consider using window functions to track user activity across consecutive months, and be prepared to explain how you would handle edge cases in your query.
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Hard Difficulty
Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.
SQL question
SQL questions test your ability to work with relational databases. Demonstrate your proficiency in writing queries, understanding database design, optimizing performance, and extracting meaningful information from structured data.