The Open Question

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

A product team wants the daily open rate for its push notifications: of the notifications sent on a given day, what share were opened (`opened` is 1). Report that rate for each send date, and include only the dates where at least one notification was opened.

Summary

Push sent. How many opened?

Practice This Problem

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