Campaign Conversion Window

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

Domain

SQL

Difficulty

hard

Seniority

L5

Problem

Our ad platform logs impressions, clicks, and purchases. For each campaign, compute the click-through rate and the conversion rate as percentages rounded to 2 decimal places. A conversion means a user who clicked an ad and then made a purchase within 7 days. Only include campaigns with at least 3 impressions.

Summary

A narrow window between impression and action.

Practice This Problem

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