ETL-BASICS5 MIN READ
Sort Bronze, Silver, and Gold Tables
Apply layered refinement in a real ETL workflow.
Sort each card by the ETL promise it tests for layered refinement. Bronze raw Silver conformed Gold business ready Raw API JSON with ingestion timestamp Deduplicated customer entity with cross source key Finance approved revenue mart by month Unparsed source CSV kept for replay Orders with valid product and customer keys Executive churn metric table
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