Campaign Engagement Rank Shift

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

Domain

SQL

Difficulty

hard

Seniority

senior

Problem

A stakeholder flagged that some campaigns lost momentum between June 2025 and October 2025. Rank each campaign by the number of impressions where clicked is 1 in each of those two months, then surface just the campaign names whose ranking position worsened (higher rank number) from June to October.

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