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  User setup impacting the <b>Perfect Matches</b> selection: None
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The process begins with a primary and a secondary dataset. The primary dataset serves as the reference for matching observations from the secondary dataset.

Perfect matches are identified when the  **match score is 100%** , indicating a  **distance of zero**  between all key pairs. These matches are detected using the standard  **Join Recipe**  in the flow.

![Screenshot 2025-11-20 at 10.42.28.png](Zs0Dpgde6LWP)

**Process by reconciliation type after perfect matching: **
-  **1-to-1** : Rows perfectly matched from primary and secondary datasets are excluded from subsequent steps in the flow. 
-  **1-to-many** : Only rows perfectly matched from secondary dataset are excluded from subsequent steps in the flow. 


