Funnel Leakage Report

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

Domain

SQL

Difficulty

hard

Seniority

senior, staff

Problem

The conversion optimization team tracks a four-step purchase funnel: page_view, add_to_cart, checkout_start, and purchase. For each step, show how many unique users reached it and the drop-off percentage from the previous step. Break the analysis down by tag.

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.