How did you implemented incremental data loading in Azure Data Factory?

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How did you implemented ADF in your projects?

In this interview question and answer video, I’ll walk you through how I implemented incremental delta loading in Azure Data Factory (ADF) for a retail client project. With over 500 GB of historical sales and inventory data, I explain how we handled the initial full load and optimized daily updates using the LastModifiedDate column as a watermark.

This approach significantly reduced data transfer volumes, bringing processing time down from hours to minutes, and saved on compute and storage costs.

Key Topics Covered:

• Initial full data load with Azure Data Factory’s Copy Data Activity.
• Using LastModifiedDate as a watermark for identifying new and updated records.
• Setting up a control table in the destination database to track the high watermark.
• Building an efficient pipeline using Lookup Activity, Copy Data Activity, and Stored Procedure Activity.
• Scheduling incremental updates to run every 24 hours.
• Real-world insights into optimizing performance and saving costs.

Who Should Watch This Video?

• Data Engineers working on ETL/ELT pipelines.
• Professionals learning Azure Data Factory.
• IT experts optimizing large-scale data workflows.

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yeah, one of important interview question

bready
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What if source table is missing timestamp data like last modified? How do you achieve incremental data load in that case? Suppose you have a table with employees information and below are the cols:
EmployeeId, Name, ManagerID, department, salary, employeehiredate, employeeterminationdate.
what is your approach for this table?

pavankumar-nimy