What is PK, FK ?

Thanks.
Michel.

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>Tyson,
>
>FWIW, all my tables use integer keys for PK and FK. I don't have any need to use concatenated keys because it's much better to use parameterized views which can be in order of the field you'd have concatenated.
>
>>I'm inquiring to see if there is any reason to not use keys of integer type. The only one I can think of off-hand is that I wouldn't be able to concatinate keys together (easily). TIA