One Year to the Next

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

Domain

SQL

Difficulty

hard

Seniority

L5

Problem

We track how many users sign up each year and want to see whether that number is climbing or falling. For each year, report the signup count alongside the percentage change from the prior year's total, rounded to the nearest whole percent.

Summary

This year versus last year. Growing or shrinking?

Practice This Problem

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