Design a User Onboarding Funnel Analysis System
This tests translating a business need into a data model and query. First, define the cohort. Then, use CTEs to find the first timestamp for each event per user. Finally, count users at each step.
This tests translating a business need into a data model and query, handling cohorts and event ordering. A strong answer first defines the 30-day signup cohort. It then uses CTEs to find the first timestamp for each required event per user. Finally, it joins these CTEs and uses conditional counts to calculate step totals and conversion rates. A major red flag is writing a single complex query that incorrectly counts users who repeat events, instead of filtering for only the first occurrence of each event.
Read the original → quadratichq.com
- #analytics
- #sql
- #data modeling
- #product metrics
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