Back Again

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

Rank users by the number of transactions they have completed, using a dense ranking so that users with equal counts share the same rank. Return the username, transaction count, and rank for users in the top 5 tiers.

Summary

Acquisition is expensive. These customers didn't need convincing twice.

Practice This Problem

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