thanks a lot for the reponse @Eyad Garelnabi , @Matt and Wynner. I have one quick question , how would i get only the csv files out of thousands of other files , if i am not using get file filter , is there anyway in the merge content processor, may be i can mention something in correlation attribute name , i am not sure about what excatly correlation attribute property is doing , and is there anyway i can use csvjoin from (csvkit) in nifi for the same requirement. Thanks in advance !!! Any help is much appreciated. ... View more