How do I practice SQL interview questions?

PracHub provides an interactive SQL console where you can write and test queries against real database schemas. Get instant feedback and compare your solution with the expected output.

What difficulty level is this coding question?

This is a hard difficulty Data Manipulation (SQL/Python) question, commonly asked during Technical Screen rounds at OpenAI.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at OpenAI during technical interviews.

Handle repeated churn in SQL | OpenAI SQL Question

Quick Overview

This question evaluates proficiency in time-based data manipulation and analytics, including handling repeated churn and resubscription, interval logic, deduplication, and per-user metric derivation using SQL and Python.

hard
OpenAI
Data Manipulation (SQL/Python)
Data Scientist

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