Duplicated User Event Messages

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

We are building a load-testing replay tool that pushes twice the normal volume from the 'user-events' topic. Emit each qualifying row exactly twice as identical copies showing the message ID, topic, partition key, payload, produced timestamp, and consumer, with the result ordered by message ID.

Summary

Duplicated messages from the alerts topic.

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