#ETLAndDataPipelines
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Your Mapping Sheet is the blueprint that defines how source fields become target fields—complete with transformation rules, data types, and validation. Must-read: https://medium.com/@ncnayak/the-secret-spec-of-etl-projects-what-exactly-is-a-data-mapping-sheet-04cbb37977ec #ETLandDataPipeline #DataValidation #TestingStrategy #DataTesting #ETLTesting
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