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In the context of ETL, a delta load (also known as a incremental load) refers to loading/refreshing only the changes or updates that have occurred since the last load.

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ETL process will load only the data modified after the last successful load. This is called delta load.

Related Pages

• ETL+ Load Upsert

• ETL+ Load Replace

• ETL+ Load Append

• https://dataself.atlassian.net/wiki/spaces/DS/pages/1964671148/Change+or+Modification+Flag+Fields+for+Delta+Updates Supplement to this page.

• https://learn.microsoft.com/en-us/azure/data-factory/tutorial-incremental-copy-overview

  • Delta data loading from database by using a watermark

• https://en.wikipedia.org/wiki/Watermark_(data_synchronization)

• https://wisedatadecisions.com/2021/07/12/data-factory-using-watermarks-pipeline-variables-and-sql-to-copy-deltas-to-data-lake/

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