المعالجة الدفعية وETL وELT

في هذا الدرس

know when batch is the right and cheaper choice and how ETL differs from ELT.

الموضوعات المخطط لها

• ETL transforms before loading; ELT loads raw data first and transforms inside the target, common with warehouses.
• Batch is simple to test, replay, and reconcile; it fits reports, finance, and bulk master data.
• Design for restarts: batches must be idempotent, with run IDs and row counts checked.
• Pick the window from business need; "real time" costs more and is often not required.