ScenarioX
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Drop 05 · July 2026
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Idempotency
Problem

An Azure SQL Agent job runs daily at 1 PM. It sends order confirmation emails via SendGrid. One day, by mistake, the same job gets triggered again at 2 PM. The job walks the same orders again and sends the same emails again. Every customer gets a duplicate confirmation.

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Built by Gaurav Sharma
20+ years shipping .NET & Azure systems
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