Duplicated User Event Messages

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

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 message exactly twice as identical copies, ordered by message ID.

Summary

Duplicated messages from the alerts topic.

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