Quick Overview

Write PostgreSQL to compare survey satisfaction for new and established users across countries. The challenge emphasizes date-based cohort rules, invalid-event filtering, response and user counts, numeric averages, grouping, and output ordering.

Compare Survey Satisfaction for New and Established Users

Company: Meta

Role: Data Scientist

Category: Data Manipulation (SQL/Python)

Difficulty: medium

Interview Round: Technical Screen

Overview: Write PostgreSQL to compare survey satisfaction for new and established users across countries. The challenge emphasizes date-based cohort rules, invalid-event filtering, response and user counts, numeric averages, grouping, and output ordering.

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