Difference between UNIQUE constraint vs index

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От John Jawed
Тема Difference between UNIQUE constraint vs index
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Msg-id a9eb35850702271643g1d07897eh21f6f47013718672@mail.gmail.com
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Ответы Re: Difference between UNIQUE constraint vs index  ("Jim C. Nasby" <jim@nasby.net>)
Re: Difference between UNIQUE constraint vs index  ("Joshua D. Drake" <jd@commandprompt.com>)
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Is there any difference as far as when the "uniqueness" of values is
checked in DML between a unique index vs a unique constraint? Or is
the only difference syntax between unique indices and constraints in
PostgreSQL?

John

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