Twice Over

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

Our ML platform's training metadata is carrying duplicate runs that quietly inflate the compute bill. Surface the models that were trained more than once, alongside how many times each one ran, most runs first.

Summary

Same model, trained twice.

Practice This Problem

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