Seen and Unseen

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

The engagement team wants to know which platforms actually get push notifications read. For each platform, give the open rate as a percentage of notifications sent, highest first.

Summary

Every ping lands somewhere. Not every one gets read.

Practice This Problem

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