Re: Simple method to format a string

> Just a small optimization would be to use a backreference with regexp_replace
> instead of regexp_matches:
>
> select regexp_replace('foobarbaz', '(...)', E'\\1 ', 'g');
>   regexp_replace
> ----------------
>   foo bar baz

Great.

After combined with several more replace(s), regexp_replace will provide 
me the expecting result.

Thanks!
Emi

-- 
select
regexp_replace(   replace(       replace(col-val, ' ', ''), '-', ''),        .... replace...    '(...)', E'\\1 ', 'g')
from tn;