Re: PRIMARY KEY and UNIQUE
От | Darren Ferguson |
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Тема | Re: PRIMARY KEY and UNIQUE |
Дата | |
Msg-id | Pine.LNX.4.10.10202141028210.3159-100000@thread.crystalballinc.com обсуждение исходный текст |
Ответ на | PRIMARY KEY and UNIQUE (Erwin Ambrosch <ambre@ebutec.com>) |
Ответы |
Re: PRIMARY KEY and UNIQUE
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Список | pgsql-general |
If it is a primary key then it will automatically be UNIQUE. You do not need the unique next to the VARCHAR in this situation Darren On Thu, 14 Feb 2002, Erwin Ambrosch wrote: > Hi, > > I have a such a table. > > CREATE TABLE int_article ( > name VARCHAR(12) UNIQUE > headline TEXT, > summary TEXT, > main TEXT, > footer TEXT, > PRIMARY KEY (name) > ); > > Is the UNIQUE constraint neccessary, because if have specified the column > name to be the primary key. > > Thanks in advance > Erwin > > ---------------------------(end of broadcast)--------------------------- > TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org >
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