¬¬' -----Mensagem original----- De: Raj Hadoop [mailto:hadoop...@yahoo.com] Enviada em: quarta-feira, 10 de setembro de 2014 15:42 Para: user@hive.apache.org Assunto: Re: Remove duplicate records in Hive
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 ________________________________ Esta mensagem pode conter informações confidenciais e somente o indivíduo ou entidade a quem foi destinada pode utilizá-la. A transmissão incorreta da mensagem não acarreta a perda de sua confidencialidade. Caso esta mensagem tenha sido recebida por engano, solicitamos que o fato seja comunicado ao remetente e que a mensagem seja eliminada de seu sistema imediatamente. É vedado a qualquer pessoa que não seja o destinatário usar, revelar, distribuir ou copiar qualquer parte desta mensagem. Ambiente de comunicação sujeito a monitoramento. This message may include confidential information and only the intended addresses have the right to use it as is, or any part of it. A wrong transmission does not break its confidentiality. If you've received it because of a mistake or erroneous transmission, please notify the sender and delete it from your system immediately. This communication environment is controlled and monitored. B2W Digital
