Frequent Message Senders

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

Surface all sender IDs who have posted more than one message, along with each sender's message count. A downstream anomaly-detection system needs these high-frequency senders.

Summary

Someone is sending too many messages.

Practice This Problem

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