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      Emerson Ecologics

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      Entrevista do cargo de Software Developer da empresa Emerson Ecologics

      Pergunta de entrevista da empresa Emerson Ecologics

      Entrevista para Software Developer

      What is the difference between UNION and UNION ALL

      Respostas da entrevista

      Sigiloso

      23 de set. de 2019

      Union avoid duplicate records AND union all does not check for duplicate records

      Sigiloso

      17 de nov. de 2016

      I don't often use unions as I feel they're indicative of bad database design, so I'll be honest and simply say I don't know.

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