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ELT (extract, load, transform)

ELT loads raw data into the warehouse first and transforms it there afterwards, using the warehouse engine.

Written by Reflective Data experts · updated Oct 5, 2026

Keeping raw data means you can re-run or change transformations later without re-extracting. Tools like dbt handle the transformation step with SQL, version control and tests.

It has become the default pattern for cloud data stacks.

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Data pipelineData warehousedbtETL (extract, transform, load)

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