Attributable Impression Rate

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

The attribution team is measuring data completeness in the ad pipeline. What percentage of all ad impressions can be tied back to a known user account? Impressions whose user cannot be found in the user records should still count toward the total but not as attributable. Return a single percentage.

Summary

What share of ad impressions can be traced to a real user account

Practice This Problem

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