| From: | Andreas Kretschmer <akretschmer(at)spamfence(dot)net> | 
|---|---|
| To: | pgsql-general(at)postgresql(dot)org | 
| Subject: | Re: Count occurrences of pattern in string | 
| Date: | 2009-10-20 17:24:52 | 
| Message-ID: | 20091020172452.GA10593@tux | 
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| Lists: | pgsql-general | 
dario(dot)ber(at)libero(dot)it <dario(dot)ber(at)libero(dot)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
-- 
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."   (unknown)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°
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