I need to replace 2 spaces by only 1 space for all entries of 1 column in an Oracle database. I found this and tried it:

SELECT REGEXP_REPLACE('MODEL', '[[:space:]]{2,}', ' ') new_string

MODEL is the column name. But it has not replaced the double spaces.

How to use that solution or what could be an alternative?

  • well I don't think you need a regular expression here, just try : REPLACE('MODEL',' ', ' ') ;) (note, 2 spaces in quotes, and 1 space, the editor mucks it up a bit)
    – Ditto
    Sep 25, 2015 at 18:01
  • @Ditto: Unless you think there may be more to this problem, I can't see a reason why you shouldn't post your suggestion as an answer.
    – Andriy M
    Sep 26, 2015 at 14:23
  • what is the result of your query?
    – miracle173
    Sep 24, 2018 at 14:35

1 Answer 1


You don't need to use a regular expression for that. Instead, you could use the replace function in SQL like this:

replace(MODEL, '  ', ' ')

where MODEL is your column, ' ' is the character(s) that you want to replace and ' ' is the character(s) you want to replace with.

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