Idempotency in Data Pipelines

Problem

A data pipeline failed halfway through its execution. If you re-run the pipeline, you need to guarantee that records are not duplicated. Write a query that outputs best_practice with the value: "Idempotent pipelines guarantee that running the same pipeline multiple times with the same input data produces the exact same final database state."

Database Schema

This problem acts as a scratchpad. You will write your own DDL/DML or conceptual queries, so there is no predefined schema.

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Solution