Calculate Daily Active Users (DAU) with SQL
This tests product sense and SQL fundamentals. Define 'active' with a core product action, describe the event data needed, then write a COUNT(DISTINCT user_id) query. A red flag is writing SQL before defining the business logic for 'active'.
This tests your ability to translate a business metric into a technical implementation. First, define 'active' by identifying a core value-driving event. Then, specify the required data schema (user_id, timestamp, event_name). Finally, present a SQL query using COUNT(DISTINCT user_id), a WHERE clause, and GROUP BY date. A red flag is writing a generic query without first discussing the business-specific definition of 'active'.
Read the original → popsql.com
- #sql
- #analytics
- #metrics
- #product sense
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