First and Last Peak Accuracy Dates

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

Domain

SQL

Difficulty

medium

Seniority

junior, mid

Problem

The ML team wants to know when peak model performance was first achieved and whether it has been replicated since. Find the highest accuracy score across all models, then show the earliest and latest training dates where that accuracy was hit.

Practice This Problem

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