Re: except command
| От | olivier.boissard@cerene.fr |
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| Тема | Re: except command |
| Дата | |
| Msg-id | 46C0CD72.5090407@cerene.fr обсуждение исходный текст |
| Ответ на | Re: except command ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>) |
| Ответы |
Re: except command
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| Список | pgsql-admin |
Thanks for your explanation And your small example was better as one page documentation I was totally wrong. So it's like a filter on the first query I think it's useful when we have complex queries . Olivier Kevin Grittner a écrit : >>>> On Mon, Aug 13, 2007 at 1:13 PM, in message >>>> > <20070814061358.d66d2cb3.steve.holdoway@firetrust.com>, Steve Holdoway > <steve.holdoway@firetrust.com> wrote: > >> On Mon, 13 Aug 2007 13:07:43 -0500 >> "Kevin Grittner" <Kevin.Grittner@wicourts.gov> wrote: >> >>> This gets me all the eye color codes that don't start with the letter 'B'. >>> (There are of course easier ways to get that...) >>> >> so is this faster than usiung 'where not exists' ?? >> > > I was trying to show a valid use of EXCEPT, not an alternative. > > -Kevin > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 7: You can help support the PostgreSQL project by donating at > > http://www.postgresql.org/about/donate > >
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