Model Accuracy Drift

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

Domain

SQL

Difficulty

hard

Seniority

L5

Problem

We track model versions and their accuracy over time. For each model, calculate the difference between the accuracy of its most recent version and the average accuracy across all previous versions, rounded to 2 decimal places. If a model has only one version, return 0 for the difference. Show model name, average lifetime accuracy, latest accuracy, and the difference.

Summary

Accuracy used to be higher.

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