Does FK have to relate to a PK?

  • DRI 101 question:

    In SQL Server 2000, does a FK HAVE TO BE defined as relating back to a PK --- or can it relate back to any generic column of similar, non-primary key data type and length?

    thx in advance

     

    BT
  • The foreign key has to refer to a column of same type and length enforced by a unique constraint (index)... it doesn't have to be a primary key nor the clustered index (however strongly suggested).

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