Re: Checking for a number

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От Lee Keel
Тема Re: Checking for a number
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Msg-id 76758090F8686C47A44B6FF52514A1D308C9C166@hermes.uai.int
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Ответ на Checking for a number  (Warren <warren@clarksnutrition.com>)
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> -----Original Message-----
> From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-
> owner@postgresql.org] On Behalf Of Warren
> Sent: Wednesday, June 27, 2007 12:31 PM
> To: pgsql-general@postgresql.org
> Subject: [GENERAL] Checking for a number
>
> I need to check if the last two characters of a field are a number. I am
> trying something like this but it does not want to work.
>
> substring(TRIM(field8) from '..$') SIMILAR TO '\d\d'
>
> How should I do this?
>
> --
> Thanks,
>
> Warren Bell
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match

Warren,

Try this...

select substring(trim(both ' ' from field8) from E'\\d{2}$') from TABLENAME
where texticregexeq(trim(both ' ' from field8), E'\\d{2}$')

This will limit the query to only the rows that end in 2 digits as well as
return those digits for you.

Hope that helps,
Lee Keel

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