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Editorial Team
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Asked: 2026-05-24T10:31:17+00:00

I would like to have a primary key column in a table that is

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I would like to have a primary key column in a table that is formatted as FOO-BAR-[identity number], for example: 

FOO-BAR-1  
FOO-BAR-2  
FOO-BAR-3  
FOO-BAR-4  
FOO-BAR-5

Can SQL Server do this? Or do I have to use C# to manage the sequence? If that’s the case, how can I get the next [identity number] part using EntityFramwork?

Thanks

EDIT:

I needed to do this is because this column represents a unique identifier of a notice send out to customers.

  • FOO will be a constant string
  • BAR will be different depending on the type of the notice (either Detection, Warning or Enforcement)

So is it better to have just an int identity column and append the values in Business Logic Layer in C#?

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1 Answer

  1. Editorial Team

    If you want this ‘composited’ field in your reports, I propose you to:

    1. Use INT IDENTITY field as PK in table
    2. Create view for this table. In this view you can additionally generate the field that you want using your strings and types.
    3. Use this view in your repoorts.

    But I still think, that there is BIG problem with DB design. I hope you’ll try to redesign using normalization.

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