Re: distinct
От | bmccoy@chapelperilous.net |
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Тема | Re: distinct |
Дата | |
Msg-id | Pine.LNX.4.10.10010092145010.4175-100000@chapelperilous.net обсуждение исходный текст |
Ответ на | distinct (andrew@networkcomputerz.com) |
Список | pgsql-general |
On Tue, 3 Oct 2000 andrew@networkcomputerz.com wrote: > I have attempted to run > select distinct col1 from tablename; > and it runs fine. > > When I run it in a real world environment: select distinct col1, col2, > col3, col4 from tablename order by col1 desc, col2; It returns all the > values from col1 which appears to be the same thing as not using > distinct at all. The DISTINCT constraint applies to all of the columns you are selecting, not just the first one -- it selects all of the distinct TUPLES from the query. Brett W. McCoy http://www.chapelperilous.net --------------------------------------------------------------------------- The Kennedy Constant: Don't get mad -- get even.
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