Remove Duplicates
Updated: Aug 28, 2026
package com.northconcepts.datapipeline.examples.cookbook;
import java.io.File;
import com.northconcepts.datapipeline.core.DataReader;
import com.northconcepts.datapipeline.core.FieldList;
import com.northconcepts.datapipeline.core.RemoveDuplicatesReader;
import com.northconcepts.datapipeline.core.StreamWriter;
import com.northconcepts.datapipeline.csv.CSVReader;
import com.northconcepts.datapipeline.job.Job;
public class RemoveDuplicates {
public static void main(String[] args) throws Throwable {
DataReader reader = new CSVReader(new File("example/data/input/credit-balance-05.csv"))
.setFieldNamesInFirstRow(true);
// returns records with unique 'Rating-CreditLimit' pairs
reader = new RemoveDuplicatesReader(
reader,
new FieldList("Rating", "CreditLimit")
);
Job.run(reader, new StreamWriter(System.out));
}
}
