Posts by vagner santiago • 11 points

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  Q: Check if the user informed data already exist in the database before entering

  I need to check in the database if the information that the user is trying to enter already exists, for example: In the registration of a company, I cannot allow the same CNPJ for others. I am doing…

  hibernate jsf jpa

  asked 9 years, 8 months ago vagner santiago 11