Loyalty's Double Tap

A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

Growth wants to know whether push notifications and display ads reinforce each other. Count the clicked ad impressions belonging to users who were also part of a loyalty push-notification campaign (any campaign whose name contains 'loyalty', case-insensitive). Join ad_impressions to push_notifs on user_id, keep only clicked impressions, and return the total count as impression_count.

Summary

When a nudge and a banner team up.

Practice This Problem

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