Incrementally load data from a source data store to a destination data store

In a data integration solution, incrementally (or delta) loading data after an initial full data load is a widely used scenario. The tutorials in this section show you different ways of loading data incrementally by using Azure Data Factory version 2.

Delta data loading by using a watermark

In this case, you define a watermark in your source database. A watermark is a column that has the last updated time stamp or an incrementing key. The delta loading solution loads the changed data between an old watermark and a new watermark. The workflow for this approach is depicted in the following diagram:

Workflow for using a watermark

For step-by-step instructions, see the following tutorials:

Delta data loading by using the Change Tracking technology

Change Tracking technology is a lightweight solution in SQL Server and Azure SQL Database that provides an efficient change tracking mechanism for applications. It enables an application to easily identify data that was inserted, updated, or deleted.

The workflow for this approach is depicted in the following diagram:

Workflow for using Change Tracking

For step-by-step instructions, see the following tutorial:
Incrementally copy data from Azure SQL Database to Azure Blob storage by using Change Tracking technology

Next steps

Advance to the following tutorial: