Re: Unique Index vs. Unique Constraint
От | Thomas LeBlanc |
---|---|
Тема | Re: Unique Index vs. Unique Constraint |
Дата | |
Msg-id | Law9-F66QmNiImcbvou0000ec1d@hotmail.com обсуждение исходный текст |
Ответ на | Unique Index vs. Unique Constraint ("Thomas LeBlanc" <thomasatiem@hotmail.com>) |
Список | pgsql-general |
Then what is the difference in these two statements? alter table Table1 add constraint Table1_UC1 unique (Field1, Field2) and create unique index Table1_Field1Field2 on Table1 (Field1, Field2) Thanks, Thomas LeBlanc >From: Dennis Gearon <gearond@fireserve.net> >To: Thomas LeBlanc <thomasatiem@hotmail.com> >Subject: Re: [GENERAL] Unique Index vs. Unique Constraint >Date: Fri, 10 Oct 2003 15:16:12 -0700 > >Uniquely so! > >Thomas LeBlanc wrote: > >>Does a Unique Constraint build a unique index? >> >>What is the difference? >> >>Thanks, >>Thomas LeBlanc >> >>_________________________________________________________________ >>Get a FREE computer virus scan online from McAfee. >>http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 >> >> >>---------------------------(end of broadcast)--------------------------- >>TIP 6: Have you searched our list archives? >> >> http://archives.postgresql.org >> > _________________________________________________________________ Help protect your PC. Get a FREE computer virus scan online from McAfee. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
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