The Three-Way Report

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

Domain

SQL

Difficulty

medium

Seniority

L5

Problem

Combine session engagement with transaction revenue into a single user report. For each user, show their name, total session count, and total transaction amount. Users with zero sessions or zero transactions must still appear; the report cannot silently drop inactive users.

Summary

Three tables. One summary. Every piece depends on the others.

Practice This Problem

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