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Removing carriage returns at the end of clob fields

Mike Ault EXPERT RESPONSE FROM: Mike Ault

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QUESTION POSED ON: 02 February 2006
I am trying to remove carriage returns at the end of clob fields by using the following in SQL*Plus: 
update scbdesc a
set    a.scbdesc_text_narrative =
      (select substr(dbms_lob.substr(scbdesc_text_narrative),1,
              length(scbdesc_text_narrative) -1)
       from   scbdesc b
       where  substr(dbms_lob.substr(b.scbdesc_text_narrative),
              length(b.scbdesc_text_narrative),1) = chr(10)
         and  a.scbdesc_subj_code = b.scbdesc_subj_code
         and  a.scbdesc_crse_numb = b.scbdesc_crse_numb
         and  a.scbdesc_term_code_eff = b.scbdesc_term_code_eff
         and  a.scbdesc_term_code_end = b.scbdesc_term_code_end) where  substr(dbms_lob.substr(a.scbdesc_text_narrative),
       length(a.scbdesc_text_narrative),1) = chr(10)
This just nulls out the field in the table. What do I need to change to make this work? Thanks for your assistance!

>
Maybe just do a substitute (replace)? 
SQL> create table test(cola clob);
SQL> insert into test values
('xxxyyy'||chr(10)||'zzzdddeee'||chr(10)||'ccccc')
SQL> /
SQL> commit;
SQL> select cola from test;

COLA
----------------------------------------------------------------------------
xxxyyy
zzzdddeee
ccccc

SQL> select replace(cola,chr(10),chr(32)) fixed from test;

FIXED
----------------------------------------------------------------------------
xxxyyy zzzdddeee ccccc


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