Обсуждение: find and replace the string within a column

Hi, <br /><br />the data in my table, have a substring enclosed in parenthesis, <br /><br />1. i want to replace the
stringwith the brackets to null or any other value.<br />2. remove the contents within brackets.<br /><br />Example:
<br/> table name person:<br /><br />name<br />------------------------------------<br />Samuel (S/o Sebastin )<br
/>-------------------------------------<br/><br />remove the word within the brackets.<br />the output should be ,
Samuel.<br/><br /> the below one help's me to find the data within the two brackets.<br /><br />SELECT
name,(REGEXP_MATCHES(name,E'\\(.+?\\)'))[1] from person;<br />regexp_matches<br />
------------------------------------<br/> (S/o Sebastin )<br /> -------------------------------------<br /><br
/>-NicholasI<br /><br /><br /> 

Hello,
> the below one help's me to find the data within the two brackets.
> 
> SELECT name,(REGEXP_MATCHES(name, E'\\(.+?\\)'))[1] from person;
> regexp_matches
> ------------------------------------
> (S/o Sebastin )
> -------------------------------------
> 
Trying to work with your code - 
update table set name = 
substr( name,1,strpos(name, (REGEXP_MATCHES(name, E'\\(.+?\\)')) )-1 ) ||
substr( name,strpos(name, (REGEXP_MATCHES(name, E'\\(.+?\\)')) ) + 1 
,char_length(name))

I am trying to find what is there before the pattern and after the pattern 
and concatenating them . Please see documentation for proper use of 
substr,strpos,cahr_length etc. 

Regards,
Jayadevan





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On 24/09/2010 5:15 PM, Nicholas I wrote:

> Example:
> table name person:
>
> name
> ------------------------------------
> Samuel (S/o Sebastin )
> -------------------------------------
>
> remove the word within the brackets.
> the output should be , Samuel.

Can't you just regexp_replace, matching \([^)]+\) (in other words "an 
open parenthisis, then a sequence of one or more of any character other 
than a close parenthesis, followed by a close parentheis) and replacing 
with an empty string ?

-- 
Craig Ringer

Tech-related writing at http://soapyfrogs.blogspot.com/

On Friday 24. September 2010 13.34.12 Craig Ringer wrote:
> On 24/09/2010 5:15 PM, Nicholas I wrote:
> 
> > Example:
> > table name person:
> >
> > name
> > ------------------------------------
> > Samuel (S/o Sebastin )
> > -------------------------------------
> >
> > remove the word within the brackets.
> > the output should be , Samuel.
> 
> Can't you just regexp_replace, matching \([^)]+\) (in other words "an 
> open parenthisis, then a sequence of one or more of any character other 
> than a close parenthesis, followed by a close parentheis) and replacing 
> with an empty string ?

I'm doing a similar task, removing comments "hidden" within curly braces like 
this:
       str := REGEXP_REPLACE(str, '{.*?}', '', 'g');

No escaping needed at all.

regards,
Leif Biberg Kristensen