The SORT_ARRAY(COLLECT_SET(date))[0] AS latest_date
is returning the lowest date. I need the largest date. -------------------------------------------- On Wed, 9/10/14, Raj Hadoop <hadoop...@yahoo.com> wrote: Subject: Re: Remove duplicate records in Hive To: user@hive.apache.org Date: Wednesday, September 10, 2014, 2:41 PM Thanks. I will try it. -------------------------------------------- On Wed, 9/10/14, Nishant Kelkar <nishant....@gmail.com> wrote: Subject: Re: Remove duplicate records in Hive To: user@hive.apache.org, hadoop...@yahoo.com Date: Wednesday, September 10, 2014, 1:59 PM Hi Raj, You can do something along these lines: SELECT cno, sqno, SORT_ARRAY(COLLECT_SET(date))[0] AS latest_date FROM table GROUP BY cno, sqno; However, you have to make sure your date format is such that sorting it gives you the most recent date. The best way to do that is to have it in format: YYYY-MM-DD. Hope this helps. Best Regards,Nishant Kelkar On Wed, Sep 10, 2014 at 10:04 AM, Raj Hadoop <hadoop...@yahoo.com> wrote: Hi, I have a requirement in Hive to remove duplicate records ( they differ only by one column i.e a date column) and keep the latest date record. Sample : Hive Table : d2 is a higher cno,sqno,date 100 1 1-oct-2013 101 2 1-oct-2013 100 1 2-oct-2013 102 2 2-oct-2013 Output needed: 100 1 2-oct-2013 101 2 1-oct-2013 102 2 2-oct-2013 I am using Hive 0.11 Any suggestions please ? Regards, Raj
