Re: how to update with a join?
От | MichaelHoeller@t-online.de |
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Тема | Re: how to update with a join? |
Дата | |
Msg-id | 200509101856.10905.MichaelHoeller@t-online.de обсуждение исходный текст |
Ответ на | how to update with a join? (Michael Hoeller <MichaelHoeller@t-online.de>) |
Ответы |
Re: how to update with a join?
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Список | pgsql-sql |
Hello all, thanks for the answere to the prev. thread. With the help of them I solved the problme I used "not like" instead of <> and this leads to a problem. This works for me: update stamm set code = replace (code, 'k' , '') where code like '%k%' and code <> '%V%'; I would still be interested to learn how to update a row when the result set is only reachable via a join. Thanks a gain Michael Michael Hoeller wrote at Samstag, 10. September 2005 18:47: > Hello > > I like to delete "k" from a string with the statement > update stamm set code = replace (code, 'k' , ''); > > But the only way to get the canditates I want to update is the > following statement. It seems that I can not update when I do a join. > > Is there a way around it? With google I found a hint that a subselect > could help but there was no exsample ... And I did not found out how > to do this. > > select a.code > from stamm a > where > a.skart in ( > (select skart > from stamm > where code like '%k%') > ) > and a.code not like '%V%'; > > I would be happy about a hint. > > Thanks a lot > Michael
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