table constraints and performance

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От Brian Maguire
Тема table constraints and performance
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Msg-id 2F2E24372F10744588A27DEECC85FE040103E7F3@vt-pe2550-001.vantage.vantage.com
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Ответы Re: table constraints and performance  (Franco Bruno Borghesi <franco@akyasociados.com.ar>)
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Could someone provide me with some information in regards to the
performance implications of applying constraints on a table?  Are there
any safe guards?

The basic scenario is that there is a table that has 80% updates and
inserts and 20% selects.  I would like to restrict duplicate inserts
from user double clicking or other user behavior such as refresh.

I am after advice on what the performance implications would be on
placing restraints on a table vs. writing business logic code.

Thanks,
Brian







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