Re: [SQL] Duplicate rows
От | Andy Lewis |
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Тема | Re: [SQL] Duplicate rows |
Дата | |
Msg-id | Pine.LNX.3.95.980516081545.14769B-100000@shell.mpsi.net обсуждение исходный текст |
Ответ на | Re: [SQL] Duplicate rows (Oleg Broytmann <phd@comus.ru>) |
Ответы |
Re: [SQL] Duplicate rows
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Список | pgsql-sql |
Right, I know that there are dups in the column. But, I don't know where they are nor do I know their value(s). I want to be able to find, say, two interger values that are in the same column but, different rows. Thanks Andy On Sat, 16 May 1998, Oleg Broytmann wrote: >Hello. > >On Fri, 15 May 1998, Andy Lewis wrote: >> I have a postgres db with at least 1000 rows in it. I'd like to know if its >> possible to detect duplicate values of a column if I don't know which values >> that are dups? > > Try to create UNIQUE index on a problematic column. If creating the >unique index failes - there are duplicates (providing that creating the >index wouldn't fail by other reasons - disk full, memory shortage, etc.) > >Oleg. >---- > Oleg Broytmann http://members.tripod.com/~phd2/ phd2@earthling.net > Programmers don't die, they just GOSUB without RETURN. > >
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