Merge VS Merge Join

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Merge
Merge Join
The data from 2 input paths are merged into one 
The data from 2 inputs are merged based on some common key.
Works as UNION ALL  
JOIN (LEFT, RIGHT OR FULL)
Supports 2 Datasets
Supports 1 Datasets
Metadata for all columns needs to be same
 Key columns metadata needs to be same.
Data must be sorted.
Data must be sorted.
Does not support error handling
Does not support error handling

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