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 medium difficulty Data Manipulation (SQL/Python) question, commonly asked during Technical Screen rounds at Meta.

What role is this question designed for?

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

Calculate Daily Survey Response Rates by Country

Quick Overview

Work through a PostgreSQL survey-analysis task that compares impressions and responses by date and country. It exercises careful joins, distinct-user counting, orphan-event handling, numeric rate calculation, output grain, and deterministic ordering.

medium
Meta
Data Manipulation (SQL/Python)
Data Scientist

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