Re: Count occurrences of pattern in string

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От Andreas Kretschmer
Тема Re: Count occurrences of pattern in string
Дата
Msg-id 20091020172452.GA10593@tux
обсуждение исходный текст
Ответ на Count occurrences of pattern in string  ("dario.ber@libero.it" <dario.ber@libero.it>)
Список pgsql-general
dario.ber@libero.it <dario.ber@libero.it> wrote:

> Hello,
>
> I'm looking for a function to count the occurrences of a pattern in a
> string. E.g. something like:
>
> fun_count_pattern('fooXblaX', 'X')
>
> which would
> return 2 (I.e. pattern 'X' found 2 times in string 'fooXblaX').

How about:

test=*# select length('fooXblaX') - length(regexp_replace('fooXblaX','X','','g')) / length('X');
 ?column?
----------
        2
(1 Zeile)



Andreas
--
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"If I was god, I would recompile penguin with --enable-fly."   (unknown)
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