Flatiron health Data Scientist Data Manipulation (SQL/Python) Interview Questions
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Flatiron Health
Medium
Data ScientistWrite SQL window functions for streaks
Assume today is 2025-09-01. Using standard SQL (e.g., PostgreSQL), answer the following using window functions only (no procedural loops, no correlate...
Data Manipulation (SQL/Python)
0
0
Oct 13, 2025
Flatiron Health
Medium
Data ScientistCompute churn metrics and rank top students
You have two tasks. Part A (R): You receive a Customers CSV with columns: id (INT), signup_date (YYYY-MM-DD), last_active_date (YYYY-MM-DD), churned (...
Data Manipulation (SQL/Python)
0
0
Oct 13, 2025