Zero Accuracy on First Training

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

Domain

SQL

Difficulty

medium

Seniority

mid, senior

Problem

What percentage of models had an accuracy of 0 on their very first training run? Only consider models with a non-null status, as null status means the training was cancelled. Return a single percentage.

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.