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Find the peak hours for ad impressions

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

Domain
SQL
Difficulty
medium

Problem

Find the peak hours for ad impressions. Return the hour as impression_hour and the count as impression_count, ordered by count descending.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.

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