Hello @Ershad Nozari ,
Thanks for the question and using MS Q&A platform.
As we understand the ask here is recommendation on join two different dataset ( in two diffrent) files and then find the delta and process it , please do let us know if its not accurate.
As I understand you atleast have two options
Use mapping data flow ( MDF ) : MDF is used mostly for transformation . You can read the data from the two files , join them and then use function like CRC32 to have the fingerprint of the row of the incoming files . Do a similar thing on the past file and compare the fongerprints and determine the delta .
You also use Synapse Analytics also ,, it offers something called spark pool ( whcih runs on Apache Spark ) and you can read the file and join the dataframes and use the hash function to determine the delta .
Please do let me if you have any queries.
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