Replace multiple space characters with a single space

Hi,
Oracle 11g R2.
Looking for a way to replace multiple space characters in a row with a single space. For example, the text "abc abc" should look like "abc abc". I tried toying with replace, but it only works for the case of 2 spaces. Need a solution for the cases where there could be 2 or more spaces.
select replace(column1, chr(32)||chr(32), chr(32)) from tablea

Hi,
If you had to do this without regular expressions, you could use:
SELECT REPLACE ( REPLACE ( REPLACE (str, ' ', '~ ')
                 , ' ~'
          , '~ '
          )     AS new_str
FROM    table_x;assuming there is some sub-string (I used '~' above) that never occurs right next to a space.
However, unless you're uisng Oracle 9 (or earlier, which you're not doing) you don't have to do this without regular expressions. As you can see, the way Solomon showed is much simpler.

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Replacing multiple spaces with a single space

Hi friends,
I have a string. It can have zero/one/multiple spaces. I want to make the multiple spaces to single space.
Here are the cases:
1. ' a b c d efg h' should be changed to 'a b c d e f g h'
2. ' a b c d e f g h ' should be changed to 'a b c d e f g h'
3. 'a b c d e f g h' should not be changed
4. 'abcdefgh' should not be changed
Both REPLACE and TRANSLATE do not help. I don't want to go for LOOP logic. Please help me to get it in SQL query.
Thanks in advance!

Hi,
964559 wrote:
Hi friends,
I have a string. It can have zero/one/multiple spaces. I want to make the multiple spaces to single space.
Here are the cases:
1. ' a b c d efg h' should be changed to 'a b c d e f g h'One solution is to post your string on this site, and then copy it back again. (See below for a more serious solution .)
This site is doing exactly what you want the function to do: it replaces multiple consecutive spaces with a single space. As a result, it's hard to see what you mean.
To preserve spacing on this site, type these 6 characters
\(small letters only, inside curly brackets) before and after each section where you want spacing preserved.
2. ' a b c d e f g h ' should be changed to 'a b c d e f g h'
3. 'a b c d e f g h' should not be changed
4. 'abcdefgh' should not be changed
Both REPLACE and TRANSLATE do not help. I don't want to go for LOOP logic. Please help me to get it in SQL query.
Thanks in advance!Regular expressions make this easy:SELECT TRIM ( REGEXP_REPLACE ( str
, ' +'
) AS compressed_str
FROM table_x;
You can use nested REPLACE calls to get the same results, but it's messy.
Edited by: Frank Kulash on Feb 5, 2013 10:18 AM
Added TRIM

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nazzu wrote:
Hi,
Is it possible to maintain multiple payment formats with in a single program.
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As shown below, I used a AL32UTF8 database.
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Aktuell teckentabell: 1250
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SQL*Plus: Release 11.1.0.6.0 - Production on Fri May 23 21:25:29 2008
Copyright (c) 1982, 2007, Oracle. All rights reserved.
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Message was edited by:
orafad
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Attachments:
GPIB_Communication_Experiment_1.vi ‏23 KB
GPIB_Communication_Experiment_2.vi ‏23 KB

Hello aps7828:
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