https://community.cloudera.com/t5/Support-Questions/Help-me-proceed-which-way-to-go/m-p/313531#M225578 <P>Looks like a programming question, you can try HashMap and use the domain value as key, then make your comparison and update the count</P><P>&nbsp;</P><P>Here is one example:&nbsp;<A href="https://stackoverflow.com/questions/46169229/how-to-count-the-number-of-unique-values-in-hashmap/46169712" target="_blank">https://stackoverflow.com/questions/46169229/how-to-count-the-number-of-unique-values-in-hashmap/46169712</A></P> Mon, 22 Mar 2021 04:49:07 GMT Daming Xue 2021-03-22T04:49:07Z