What is the difference between Merge and Union All Transformation in SSIS Package

In this video you will learn how to answer SSIS interview question "What is the difference between Merge and Union All Transformation in SSIS Package?"

You will learn
  1. How to use Union All transformation in SSIS Package
  2. How to use Merge Transformation in SSIS Package
  3. How to use Multicast Transformation for Testing purpose
  4. how to use Data Viewer in SSIS Package to view data while debugging

What is the difference between Merge and Union All Transformation in SSIS Package - SQL Server Integration Services(SSIS) Tutorial

2 comments:

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  2. Jenna WilsonJanuary 5, 2025 at 10:49 PM

    In an SSIS package, **Merge** combines two sorted datasets into one while maintaining the sort order, requiring similar columns. **Union All** merges multiple datasets without sorting, allowing mismatched column counts by adding nulls where necessary. Use **Merge** for ordered data and **Union All** for flexibility. https://alightmotionmods.net/

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