Above the Fold

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

Domain

SQL

Difficulty

hard

Seniority

L3

Problem

We score how well search did on each query: a 1 when the user clicked nothing, a 3 when they clicked one of the top three results, and a 2 when they clicked a result further down. Leave a query unrated when its click outcome was never captured, and return each query ID with its score.

Summary

Every click is a vote on the ranking. Score each search.

Practice This Problem

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