Split string by space and character as delimiter in Oracle with regexp_substr

Question

I\'m trying to split a string with regexp_subtr, but i can\'t make it work.

So, first, i have this query

select regexp_substr(\'Helloworld - test!\'          


        

Answer 1

CREATE OR REPLACE FUNCTION field(i_string            VARCHAR2
                                ,i_delimiter         VARCHAR2
                                ,i_occurance         NUMBER
                                ,i_return_number     NUMBER DEFAULT 0
                                ,i_replace_delimiter VARCHAR2) RETURN VARCHAR2     IS
  -----------------------------------------------------------------------
  -- Function Name.......: FIELD
  -- Author..............: Dan Simson
  -- Date................: 05/06/2016 
  -- Description.........: This function is similar to the one I used from 
  --                       long ago by Prime Computer.  You can easily
  --                       parse a delimited string.
  -- Example.............: 
  --  String.............: This is a cool function
  --  Delimiter..........: ' '
  --  Occurance..........: 2
  --  Return Number......: 3
  --  Replace Delimiter..: '/'
  --  Return Value.......: is/a/cool
  --------------------------------------------------------------------------    ---                                    
  v_return_string  VARCHAR2(32767);
  n_start          NUMBER := i_occurance;
  v_delimiter      VARCHAR2(1);
  n_return_number  NUMBER := i_return_number;
  n_max_delimiters NUMBER := regexp_count(i_string, i_delimiter);
BEGIN
  IF i_return_number > n_max_delimiters THEN
    n_return_number := n_max_delimiters + 1;
  END IF;
  FOR a IN 1 .. n_return_number LOOP
    v_return_string := v_return_string || v_delimiter || regexp_substr    (i_string, '[^' || i_delimiter || ']+', 1, n_start);
    n_start         := n_start + 1;
    v_delimiter     := nvl(i_replace_delimiter, i_delimiter);
  END LOOP;
  RETURN(v_return_string);
END field;


SELECT field('This is a cool function',' ',2,3,'/') FROM dual;

SELECT regexp_substr('This is a cool function', '[^ ]+', 1, 1) Word1
      ,regexp_substr('This is a cool function', '[^ ]+', 1, 2) Word2
      ,regexp_substr('This is a cool function', '[^ ]+', 1, 3) Word3
      ,regexp_substr('This is a cool function', '[^ ]+', 1, 4) Word4
      ,regexp_substr('This is a cool function', '[^ ]+', 1, 5) Word5
  FROM dual;