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      Bridgenext

      Empresa engajada

      Entrevista do cargo de Software Engineer da empresa Bridgenext

      Pergunta de entrevista da empresa Bridgenext

      Entrevista para Software Engineer

      Can there be multiple null values in column which have unique constraint set?

      Respostas da entrevista

      Sigiloso

      16 de nov. de 2013

      No.But there are multiple workarounds, one of it is as follow CREATE UNIQUE INDEX indexName ON tableName(columns) INCLUDE includeColumns WHERE columnName IS NOT NULL

      3

      Sigiloso

      29 de jun. de 2018

      unique key constraint column allow only once null value. If we try to add another null value it shows an error as - can not insert null value.

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